diff --git a/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj b/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
index 01ca2c13..9b2ac39f 100644
--- a/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
+++ b/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
@@ -49,6 +49,9 @@
     <ProjectReference Include="..\HandyControl_Core_30\HandyControl_Core_30.csproj" />
   </ItemGroup>
   <ItemGroup>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\Cover.png">
+      <Link>Resources\Img\Cover.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\QQ\1.gif">
       <Link>Resources\Img\QQ\1.gif</Link>
     </Resource>
diff --git a/src/Core_30/HandyControl_Core_30/Themes/Styles/Base/ComboBoxBaseStyle.xaml b/src/Core_30/HandyControl_Core_30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
index cac49e40..f57cf567 100644
--- a/src/Core_30/HandyControl_Core_30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
+++ b/src/Core_30/HandyControl_Core_30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -134,7 +135,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -198,13 +199,13 @@
 
     <!--标题在左侧的下拉框模板-->
     <ControlTemplate x:Key="ComboBoxLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -342,7 +343,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -406,13 +407,13 @@
 
     <!--标题在左侧的可编辑下拉框模板-->
     <ControlTemplate x:Key="ComboBoxEditableLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -539,7 +540,8 @@
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource ComboBoxTopTemplate}"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Style.Triggers>
             <MultiTrigger>
                 <MultiTrigger.Conditions>
@@ -578,7 +580,7 @@
         <Grid >
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -682,13 +684,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -789,7 +791,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -913,7 +915,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -1052,13 +1054,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -1173,13 +1175,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
diff --git a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
index 1df7079e..76b42023 100644
--- a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
+++ b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
@@ -430,6 +430,9 @@
       <Generator>TextTemplatingFileGenerator</Generator>
       <LastGenOutput>MessageToken.cs</LastGenOutput>
     </Content>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\Cover.png">
+      <Link>Resources\Img\Cover.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\DottedSplitter_16x.png">
       <Link>Resources\Img\LeftMainContent\DottedSplitter_16x.png</Link>
     </Resource>
diff --git a/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/ComboBoxBaseStyle.xaml b/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/ComboBoxBaseStyle.xaml
index 5bef81f0..345a0d45 100644
--- a/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/ComboBoxBaseStyle.xaml
+++ b/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/ComboBoxBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -127,7 +128,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -184,13 +185,13 @@
 
     <!--标题在左侧的下拉框模板-->
     <ControlTemplate x:Key="ComboBoxLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -314,7 +315,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -371,13 +372,13 @@
 
     <!--标题在左侧的可编辑下拉框模板-->
     <ControlTemplate x:Key="ComboBoxEditableLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -497,7 +498,8 @@
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource ComboBoxTopTemplate}"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Style.Triggers>
             <MultiTrigger>
                 <MultiTrigger.Conditions>
@@ -536,7 +538,7 @@
         <Grid >
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -633,13 +635,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -733,7 +735,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -850,7 +852,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -982,13 +984,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -1096,13 +1098,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
diff --git a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
index 372bc73c..28ac4d6e 100644
--- a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
+++ b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
@@ -496,6 +496,9 @@
       <Generator>TextTemplatingFileGenerator</Generator>
       <LastGenOutput>MessageToken.cs</LastGenOutput>
     </Content>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\Cover.png">
+      <Link>Resources\Img\Cover.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\DottedSplitter_16x.png">
       <Link>Resources\Img\LeftMainContent\DottedSplitter_16x.png</Link>
     </Resource>
diff --git a/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Base/ComboBoxBaseStyle.xaml b/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Base/ComboBoxBaseStyle.xaml
index cac49e40..f57cf567 100644
--- a/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Base/ComboBoxBaseStyle.xaml
+++ b/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Base/ComboBoxBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -134,7 +135,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -198,13 +199,13 @@
 
     <!--标题在左侧的下拉框模板-->
     <ControlTemplate x:Key="ComboBoxLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -342,7 +343,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -406,13 +407,13 @@
 
     <!--标题在左侧的可编辑下拉框模板-->
     <ControlTemplate x:Key="ComboBoxEditableLeftTemplate" TargetType="ComboBox">
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -539,7 +540,8 @@
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource ComboBoxTopTemplate}"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Style.Triggers>
             <MultiTrigger>
                 <MultiTrigger.Conditions>
@@ -578,7 +580,7 @@
         <Grid >
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -682,13 +684,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -789,7 +791,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -913,7 +915,7 @@
         <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -1052,13 +1054,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -1173,13 +1175,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto" MinWidth="30"/>
             </Grid.ColumnDefinitions>
-            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
diff --git a/src/Shared/HandyControlDemo_Shared/App.xaml.cs b/src/Shared/HandyControlDemo_Shared/App.xaml.cs
index 167cef26..cd97b41f 100644
--- a/src/Shared/HandyControlDemo_Shared/App.xaml.cs
+++ b/src/Shared/HandyControlDemo_Shared/App.xaml.cs
@@ -3,7 +3,7 @@ using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Net;
-using System.Security.Authentication;
+using System.Security.Authentication; 
 using System.Threading;
 using System.Windows;
 using HandyControl.Data;
@@ -41,6 +41,9 @@ namespace HandyControlDemo
 
         protected override void OnStartup(StartupEventArgs e)
         {
+            var splashScreen = new SplashScreen("Resources/Img/Cover.png");
+            splashScreen.Show(true);
+
             base.OnStartup(e);
 
             UpdateRegistry();
diff --git a/src/Shared/HandyControlDemo_Shared/Resources/Img/Cover.png b/src/Shared/HandyControlDemo_Shared/Resources/Img/Cover.png
new file mode 100644
index 00000000..a00e26b6
Binary files /dev/null and b/src/Shared/HandyControlDemo_Shared/Resources/Img/Cover.png differ
diff --git a/src/Shared/HandyControl_Shared/Controls/Attach/InfoElement.cs b/src/Shared/HandyControl_Shared/Controls/Attach/InfoElement.cs
index 654baae1..43b0ad00 100644
--- a/src/Shared/HandyControl_Shared/Controls/Attach/InfoElement.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Attach/InfoElement.cs
@@ -44,5 +44,29 @@ namespace HandyControl.Controls
         public static void SetContentHeight(DependencyObject element, double value) => element.SetValue(ContentHeightProperty, value);
 
         public static double GetContentHeight(DependencyObject element) => (double)element.GetValue(ContentHeightProperty);
+
+        /// <summary>
+        ///     最小内容高度
+        /// </summary>
+        public static readonly DependencyProperty MinContentHeightProperty = DependencyProperty.RegisterAttached(
+            "MinContentHeight", typeof(double), typeof(InfoElement), new PropertyMetadata(30.0));
+
+        public static void SetMinContentHeight(DependencyObject element, double value)
+            => element.SetValue(MinContentHeightProperty, value);
+
+        public static double GetMinContentHeight(DependencyObject element)
+            => (double) element.GetValue(MinContentHeightProperty);
+
+        /// <summary>
+        ///     最大内容高度
+        /// </summary>
+        public static readonly DependencyProperty MaxContentHeightProperty = DependencyProperty.RegisterAttached(
+            "MaxContentHeight", typeof(double), typeof(InfoElement), new PropertyMetadata(double.PositiveInfinity));
+
+        public static void SetMaxContentHeight(DependencyObject element, double value)
+            => element.SetValue(MaxContentHeightProperty, value);
+
+        public static double GetMaxContentHeight(DependencyObject element)
+            => (double) element.GetValue(MaxContentHeightProperty);
     }
 }
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index 0eb2b080..68ed8f5c 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -55,6 +55,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\BorderCircularClipConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ColLayoutConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\CornerRadiusSplitConverter.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Double2GridLengthConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Number2PercentageConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\RectangleCircularConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ThicknessSplitConverter.cs" />
diff --git a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
index cb0c9fda..bdf0240d 100644
--- a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
@@ -22,5 +22,6 @@
     <converter:RectangleCircularConverter x:Key="RectangleCircularConverter"/>
     <converter:ThicknessSplitConverter x:Key="ThicknessSplitConverter"/>
     <converter:CornerRadiusSplitConverter x:Key="CornerRadiusSplitConverter"/>
-    <MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter" />
+    <MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter"/>
+    <converter:Double2GridLengthConverter x:Key="Double2GridLengthConverter" />
 </ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml
index 894b03ad..34ae29ce 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Converters.xaml"/>
@@ -46,7 +47,7 @@
                                 <ColumnDefinition Width="*"/>
                                 <ColumnDefinition Width="30"/>
                             </Grid.ColumnDefinitions>
-                            <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                            <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                             <DatePickerTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource DatePickerTextBoxStyle}"/>
                             <Popup Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                         </Grid>
@@ -85,7 +86,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -97,8 +98,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <DatePickerTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource DatePickerTextBoxStyle}"/>
                     <Popup Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -132,12 +132,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="DatePickerExtendLeftTemplate" TargetType="DatePicker">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -147,8 +147,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <DatePickerTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource DatePickerTextBoxStyle}"/>
                     <Popup Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -184,6 +183,8 @@
     <Style x:Key="DatePickerExtendBaseStyle" BasedOn="{StaticResource DatePickerBaseStyle}" TargetType="DatePicker">
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Template" Value="{StaticResource DatePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
@@ -205,7 +206,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -219,8 +220,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <DatePickerTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource DatePickerTextBoxStyle}"/>
                     <Popup Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -278,12 +279,12 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -295,8 +296,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource CalendarGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False"/>
                     <DatePickerTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource DatePickerTextBoxStyle}"/>
                     <Popup Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
index e9ad4187..f29c6e51 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Converters.xaml"/>
@@ -27,7 +28,7 @@
                                 <ColumnDefinition Width="*"/>
                                 <ColumnDefinition Width="30"/>
                             </Grid.ColumnDefinitions>
-                            <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                            <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                             <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                             <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                         </Grid>
@@ -66,7 +67,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -78,7 +79,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -112,12 +113,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="DateTimePickerExtendLeftTemplate" TargetType="controls:DateTimePicker">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -127,7 +128,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -163,6 +164,8 @@
     <Style x:Key="DateTimePickerExtendBaseStyle" BasedOn="{StaticResource DateTimePickerBaseStyle}" TargetType="controls:DateTimePicker">
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Template" Value="{StaticResource DateTimePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
@@ -184,7 +187,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -198,8 +201,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -257,12 +260,12 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -274,8 +277,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
index 5c9950f8..e41e3429 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -35,8 +36,8 @@
                                 <ColumnDefinition Width="Auto"/>
                             </Grid.ColumnDefinitions>
                             <controls:WatermarkTextBox Focusable="True" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-                            <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,16" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
-                            <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,16,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                            <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,14" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                            <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,14,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
                         </Grid>
                     </Border>
                     <ControlTemplate.Triggers>
@@ -62,7 +63,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Foreground="{TemplateBinding Foreground}" Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -75,8 +76,8 @@
                         <ColumnDefinition Width="Auto"/>
                     </Grid.ColumnDefinitions>
                     <controls:WatermarkTextBox Margin="-2,0" CaretBrush="{TemplateBinding Foreground}" Focusable="True" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,16" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,16,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,14" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,14,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
                 </Grid>
             </Border>
         </Grid>
@@ -94,12 +95,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="NumericUpDownExtendLeftTemplate" TargetType="controls:NumericUpDown">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Foreground="{TemplateBinding Foreground}" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -110,8 +111,8 @@
                         <ColumnDefinition Width="Auto"/>
                     </Grid.ColumnDefinitions>
                     <controls:WatermarkTextBox Margin="-2,0" CaretBrush="{TemplateBinding Foreground}" Focusable="True" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,16" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,16,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="5,7,5,1" Margin="0,0,0,14" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="5,1,5,7" Margin="0,14,0,0" Focusable="False" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
                 </Grid>
             </Border>
         </Grid>
@@ -130,7 +131,8 @@
 
     <Style x:Key="NumericUpDownExtendBaseStyle" BasedOn="{StaticResource NumericUpDownBaseStyle}" TargetType="controls:NumericUpDown">
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource NumericUpDownExtendTopTemplate}"/>
         <Style.Triggers>
@@ -153,7 +155,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <TextBlock FontSize="12" Text="{TemplateBinding ErrorStr}" Name="TextBlockError" VerticalAlignment="Bottom" Margin="9,0,0,4" Foreground="{DynamicResource DangerBrush}" Grid.Row="1"/>
             <StackPanel Grid.Row="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
@@ -168,9 +170,9 @@
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-                    <Button Command="interactivity:ControlCommands.Clear" Name="ButtonClear"  Width="16" Visibility="Collapsed" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Command="interactivity:ControlCommands.Prev" Padding="0,7,5,1" Margin="0,0,0,16" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
-                    <Button Command="interactivity:ControlCommands.Next" Padding="0,1,5,7" Margin="0,16,0,0" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Name="ButtonClear"  Width="16" Visibility="Collapsed" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Command="interactivity:ControlCommands.Prev" Padding="0,7,5,1" Margin="0,0,0,14" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Command="interactivity:ControlCommands.Next" Padding="0,1,5,7" Margin="0,14,0,0" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
                 </Grid>
             </Border>
         </Grid>
@@ -212,7 +214,7 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
@@ -230,9 +232,9 @@
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
                     <controls:WatermarkTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-                    <Button Command="interactivity:ControlCommands.Clear" Name="PART_ButtonClear" Width="16" Visibility="Collapsed" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="0,7,5,1" Margin="0,0,0,16" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
-                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="0,1,5,7" Margin="0,16,0,0" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Name="PART_ButtonClear" Width="16" Visibility="Collapsed" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Prev" Padding="0,7,5,1" Margin="0,0,0,14" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource UpGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
+                    <Button Visibility="{TemplateBinding ShowUpDownButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Next" Padding="0,1,5,7" Margin="0,14,0,0" Focusable="False" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" controls:IconElement.Geometry="{StaticResource DownGeometry}" Style="{StaticResource ButtonIcon}" Width="30" VerticalAlignment="Center" Height="14"/>
                 </Grid>
             </Border>
         </Grid>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
index e06d7e23..e40e028c 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Converters.xaml"/>
@@ -53,7 +54,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -82,12 +83,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="PasswordBoxExtendLeftTemplate" TargetType="PasswordBox">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -116,7 +117,8 @@
     <Style x:Key="PasswordBoxExtendBaseStyle" BasedOn="{StaticResource PasswordBoxBaseStyle}" TargetType="PasswordBox">
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="controls:PasswordBoxAttach.IsMonitoring" Value="True"/>
         <Setter Property="Template" Value="{StaticResource PasswordBoxExtendTopTemplate}"/>
         <Style.Triggers>
@@ -168,7 +170,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition/>
@@ -227,14 +229,14 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
                 <ColumnDefinition Width="Auto"/>
                 <ColumnDefinition Width="Auto"/>
             </Grid.ColumnDefinitions>
-            <StackPanel Grid.Column="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal"  Margin="0,8,6,8">
+            <StackPanel Grid.Column="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal"  Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -293,7 +295,7 @@
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Padding" Value="{StaticResource DefaultInputPadding}"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.PositiveInfinity}"/>
         <Setter Property="controls:PasswordBoxAttach.IsMonitoring" Value="True"/>
         <Setter Property="Focusable" Value="False"/>
         <Setter Property="Template" Value="{StaticResource PasswordBoxPlusTopTemplate}"/>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
index 5f40254b..71b6795f 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="TextBoxBaseStyle.xaml"/>
@@ -17,7 +18,7 @@
                                 <ColumnDefinition/>
                                 <ColumnDefinition Width="30"/>
                             </Grid.ColumnDefinitions>
-                            <Button Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                            <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                             <ScrollViewer Margin="-2,0" Grid.Row="0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
                         </Grid>
                     </Border>
@@ -41,7 +42,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -53,7 +54,7 @@
                         <ColumnDefinition/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <TextBlock HorizontalAlignment="Stretch" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Row="0" Grid.Column="0" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource TextBlockDefaultThiLight}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}"/>
                     <ScrollViewer Margin="-2,0" Grid.Row="0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
                 </Grid>
@@ -73,12 +74,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="SearchBarExtendLeftTemplate" TargetType="controls:SearchBar">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -88,7 +89,7 @@
                         <ColumnDefinition/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <TextBlock HorizontalAlignment="Stretch" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Row="0" Grid.Column="0" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource TextBlockDefaultThiLight}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}"/>
                     <ScrollViewer Margin="-2,0" Grid.Row="0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
                 </Grid>
@@ -110,6 +111,8 @@
     <Style x:Key="SearchBarExtendBaseStyle" BasedOn="{StaticResource SearchBarBaseStyle}" TargetType="controls:SearchBar">
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Template" Value="{StaticResource SearchBarExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
@@ -131,7 +134,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -145,8 +148,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <TextBlock HorizontalAlignment="Stretch" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Row="0" Grid.Column="0" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource TextBlockDefaultThiLight}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}"/>
                     <ScrollViewer Margin="-2,0" Grid.Row="0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
                 </Grid>
@@ -190,12 +193,12 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -207,8 +210,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Search" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource SearchGeometry}" Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <TextBlock HorizontalAlignment="Stretch" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Row="0" Grid.Column="0" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Style="{StaticResource TextBlockDefaultThiLight}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}"/>
                     <ScrollViewer Margin="-2,0" Grid.Row="0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
                 </Grid>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
index a4a2fa47..88975e61 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Converters.xaml"/>
@@ -72,7 +73,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Foreground="{DynamicResource PrimaryTextBrush}" Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -98,12 +99,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="TextBoxExtendLeftTemplate" TargetType="TextBox">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Foreground="{DynamicResource PrimaryTextBrush}" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -128,7 +129,8 @@
 
     <Style x:Key="TextBoxExtendBaseStyle" BasedOn="{StaticResource TextBoxBaseStyle}" TargetType="TextBox">
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
-        <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource TextBoxExtendTopTemplate}"/>
         <Style.Triggers>
@@ -151,7 +153,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <TextBlock FontSize="12" Text="{TemplateBinding ErrorStr}" Name="TextBlockError" VerticalAlignment="Bottom" Margin="9,0,0,4" Foreground="{DynamicResource DangerBrush}" Grid.Row="1"/>
             <StackPanel Grid.Row="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
@@ -166,7 +168,7 @@
                     </Grid.ColumnDefinitions>
                     <TextBlock VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}" HorizontalAlignment="Stretch" Style="{StaticResource TextBlockDefaultThiLight}" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}"/>
                     <ScrollViewer Style="{x:Null}" Margin="-2,0" Grid.Column="0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
-                    <Button Command="interactivity:ControlCommands.Clear" Margin="0,0,7,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Margin="0,0,7,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
                 </Grid>
             </Border>
         </Grid>
@@ -208,13 +210,13 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
             <TextBlock FontSize="12" Text="{TemplateBinding ErrorStr}" Name="TextBlockError" VerticalAlignment="Bottom" Margin="9,0,0,4" Foreground="{DynamicResource DangerBrush}" Grid.Column="1"/>
-            <StackPanel Grid.Column="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Grid.Column="0" Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Foreground="{DynamicResource PrimaryTextBrush}" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -226,7 +228,7 @@
                     </Grid.ColumnDefinitions>
                     <TextBlock VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" Visibility="{TemplateBinding Text,Converter={StaticResource String2VisibilityReConverter}}" HorizontalAlignment="Stretch" Style="{StaticResource TextBlockDefaultThiLight}" Text="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}"/>
                     <ScrollViewer Style="{x:Null}" Grid.Column="0" Margin="-2,0" Padding="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
-                    <Button Command="interactivity:ControlCommands.Clear" Margin="0,0,7,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Margin="0,0,7,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
                 </Grid>
             </Border>
         </Grid>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
index ae115ada..d9859afa 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls"
-                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -27,7 +28,7 @@
                                 <ColumnDefinition Width="*"/>
                                 <ColumnDefinition Width="30"/>
                             </Grid.ColumnDefinitions>
-                            <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                            <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                             <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                             <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                         </Grid>
@@ -66,7 +67,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -78,7 +79,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -112,12 +113,12 @@
     </ControlTemplate>
 
     <ControlTemplate x:Key="TimePickerExtendLeftTemplate" TargetType="controls:TimePicker">
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -127,7 +128,7 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="30"/>
                     </Grid.ColumnDefinitions>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="1" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -163,6 +164,8 @@
     <Style x:Key="TimePickerExtendBaseStyle" BasedOn="{StaticResource TimePickerBaseStyle}" TargetType="controls:TimePicker">
         <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
+        <Setter Property="controls:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="controls:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Template" Value="{StaticResource TimePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
@@ -184,7 +187,7 @@
         <Grid>
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
-                <RowDefinition Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <RowDefinition MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}"/>
             </Grid.RowDefinitions>
             <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
                 <TextBlock Margin="1,0,0,0" Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
@@ -198,8 +201,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox x:Name="PART_TextBox" Padding="{TemplateBinding Padding}" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
@@ -257,12 +260,12 @@
                 <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
             </Storyboard>
         </ControlTemplate.Resources>
-        <Grid Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
+        <Grid MinHeight="{Binding Path=(controls:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(controls:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="{Binding Path=(controls:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,8,6,8">
+            <StackPanel Visibility="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7">
                 <TextBlock Text="{Binding Path=(controls:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
                 <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(controls:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(controls:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
             </StackPanel>
@@ -274,8 +277,8 @@
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="25"/>
                     </Grid.ColumnDefinitions>
-                    <Button Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
-                    <Button Style="{StaticResource ButtonIcon}" Padding="2,7,7,7" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
+                    <Button Height="{x:Static system:Double.NaN}" Command="interactivity:ControlCommands.Clear" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" controls:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{Binding BorderBrush,ElementName=templateRoot}"/>
+                    <Button Height="{x:Static system:Double.NaN}" Style="{StaticResource ButtonIcon}" Padding="2,6,7,6" controls:IconElement.Geometry="{StaticResource ClockGeometry}" x:Name="PART_Button"  Grid.Column="2" Foreground="{Binding BorderBrush,ElementName=templateRoot}" Focusable="False" Grid.Row="0"/>
                     <controls:WatermarkTextBox Padding="{TemplateBinding Padding}" x:Name="PART_TextBox" Watermark="{Binding Path=(controls:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Stretch" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Grid.Row="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     <Popup TextElement.FontSize="12" Grid.Column="0" VerticalOffset="1" x:Name="PART_Popup" PopupAnimation="Fade" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                 </Grid>
diff --git a/src/Shared/HandyControl_Shared/Tools/Converter/Double2GridLengthConverter.cs b/src/Shared/HandyControl_Shared/Tools/Converter/Double2GridLengthConverter.cs
new file mode 100644
index 00000000..f8c0b184
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Tools/Converter/Double2GridLengthConverter.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Converter
+{
+    public class Double2GridLengthConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is double doubleValue)
+            {
+                if (double.IsNaN(doubleValue) || double.IsInfinity(doubleValue))
+                {
+                    return new GridLength(1.0, GridUnitType.Star);
+                }
+                return new GridLength(doubleValue);
+            }
+
+            return new GridLength(0);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}