diff --git a/README.md b/README.md
index f6426bca..c6676eac 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,10 @@ Step 4：enjoy coding
 
 ## Latest examples
 
+### SplitButton
+
+![SplitButton](https://raw.githubusercontent.com/HandyOrg/HandyOrgResource/master/HandyControl/Resources/SplitButton.png)
+
 ### FloatingBlock
 
 ![FloatingBlock](https://raw.githubusercontent.com/HandyOrg/HandyOrgResource/master/HandyControl/Resources/FloatingBlock.gif)
diff --git a/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj b/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
index ad7fbab1..a463f64c 100644
--- a/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
+++ b/src/Core_30/HandyControlDemo_Core_30/HandyControlDemo_Core30.csproj
@@ -417,6 +417,9 @@
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\thumbs_up.png">
       <Link>Resources\Img\thumbs_up.png</Link>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\SplitButton_16x.png">
+      <Link>Resources\Img\SplitButton_16x.png</Link>
+    </Resource>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="..\..\Shared\HandyControlDemo_Shared\Properties\Langs\Lang.en.resx">
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 ec88f225..d248b76b 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 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -528,7 +527,7 @@
 
     <!--下拉框扩展样式-->
     <Style x:Key="ComboBoxExtendBaseStyle" BasedOn="{StaticResource ComboBoxBaseStyle}" TargetType="ComboBox">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <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}"/>
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 ba107c4e..3c9f4539 100644
--- a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
+++ b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
@@ -429,6 +429,9 @@
       <Generator>TextTemplatingFileGenerator</Generator>
       <LastGenOutput>MessageToken.cs</LastGenOutput>
     </Content>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\SplitButton_16x.png">
+      <Link>Resources\Img\LeftMainContent\SplitButton_16x.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\thumbs_up.png">
       <Link>Resources\Img\LeftMainContent\thumbs_up.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 96d3122e..eb3437d3 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 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -486,7 +485,7 @@
 
     <!--下拉框扩展样式-->
     <Style x:Key="ComboBoxExtendBaseStyle" BasedOn="{StaticResource ComboBoxBaseStyle}" TargetType="ComboBox">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <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}"/>
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 2287cbee..dfa44c93 100644
--- a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
+++ b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
@@ -492,6 +492,9 @@
       <Generator>TextTemplatingFileGenerator</Generator>
       <LastGenOutput>MessageToken.cs</LastGenOutput>
     </Content>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\SplitButton_16x.png">
+      <Link>Resources\Img\LeftMainContent\SplitButton_16x.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\thumbs_up.png">
       <Link>Resources\Img\LeftMainContent\thumbs_up.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 ec88f225..d248b76b 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 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -528,7 +527,7 @@
 
     <!--下拉框扩展样式-->
     <Style x:Key="ComboBoxExtendBaseStyle" BasedOn="{StaticResource ComboBoxBaseStyle}" TargetType="ComboBox">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <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}"/>
diff --git a/src/Shared/HandyControlDemo_Shared/App.xaml.cs b/src/Shared/HandyControlDemo_Shared/App.xaml.cs
index 1392706a..8aa3870f 100644
--- a/src/Shared/HandyControlDemo_Shared/App.xaml.cs
+++ b/src/Shared/HandyControlDemo_Shared/App.xaml.cs
@@ -53,6 +53,16 @@ namespace HandyControlDemo
                 Source = new Uri("pack://application:,,,/HandyControlDemo;component/Resources/Themes/Theme.xaml")
             });
             Current.MainWindow?.OnApplyTemplate();
+
+            Resources.MergedDictionaries.Clear();
+            Resources.MergedDictionaries.Add(new ResourceDictionary
+            {
+                Source = new Uri($"pack://application:,,,/HandyControl;component/Themes/Skin{skin.ToString()}.xaml")
+            });
+            Resources.MergedDictionaries.Add(new ResourceDictionary
+            {
+                Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
+            });
         }
     }
 }
diff --git a/src/Shared/HandyControlDemo_Shared/Data/MessageToken.cs b/src/Shared/HandyControlDemo_Shared/Data/MessageToken.cs
index 818d5fba..5df6ed53 100644
--- a/src/Shared/HandyControlDemo_Shared/Data/MessageToken.cs
+++ b/src/Shared/HandyControlDemo_Shared/Data/MessageToken.cs
@@ -116,6 +116,8 @@
 	
         public static readonly string FloatingBlockDemoCtl = nameof(FloatingBlockDemoCtl);
 	
+        public static readonly string SplitButtonDemoCtl = nameof(SplitButtonDemoCtl);
+	
         public static readonly string ButtonDemoCtl = nameof(ButtonDemoCtl);
 
         public static readonly string RepeatButtonDemoCtl = nameof(RepeatButtonDemoCtl);
diff --git a/src/Shared/HandyControlDemo_Shared/Data/MessageToken.tt b/src/Shared/HandyControlDemo_Shared/Data/MessageToken.tt
index 01e20c31..8b0426b2 100644
--- a/src/Shared/HandyControlDemo_Shared/Data/MessageToken.tt
+++ b/src/Shared/HandyControlDemo_Shared/Data/MessageToken.tt
@@ -60,7 +60,8 @@ var controlList = new List<string>
 	"HoneycombPanelDemoCtl",
 	"SpriteDemoCtl",
 	"NotificationDemoCtl",
-	"FloatingBlockDemoCtl"
+	"FloatingBlockDemoCtl",
+	"SplitButtonDemoCtl"
 };
 var styleList = new List<string>
 {
diff --git a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
index cddc13cc..38e214fb 100644
--- a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
+++ b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
@@ -183,6 +183,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Controls\SideMenuDemoCtl.xaml.cs">
       <DependentUpon>SideMenuDemoCtl.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)UserControl\Controls\SplitButtonDemoCtl.xaml.cs">
+      <DependentUpon>SplitButtonDemoCtl.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Controls\SpriteDemoCtl.xaml.cs">
       <DependentUpon>SpriteDemoCtl.xaml</DependentUpon>
     </Compile>
@@ -338,6 +341,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\PaginationDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\SearchBarDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\SideMenuDemoViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\SplitButtonDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\SpriteDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\StepBarDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\TabControlDemoViewModel.cs" />
@@ -621,6 +625,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)UserControl\Controls\SplitButtonDemoCtl.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)UserControl\Controls\SpriteDemoCtl.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
index 71c11a57..a5c6c81e 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
@@ -1401,6 +1401,15 @@ namespace HandyControlDemo.Properties.Langs {
             }
         }
         
+        /// <summary>
+        ///   查找类似 分割按钮 的本地化字符串。
+        /// </summary>
+        public static string SplitButton {
+            get {
+                return ResourceManager.GetString("SplitButton", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 精灵 的本地化字符串。
         /// </summary>
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
index 5114bdd6..3159b7da 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
@@ -663,4 +663,7 @@
   <data name="FloatingBlock" xml:space="preserve">
     <value>FloatingBlock</value>
   </data>
+  <data name="SplitButton" xml:space="preserve">
+    <value>SplitButton</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
index 07d9c0ff..5c85daba 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
@@ -663,4 +663,7 @@
   <data name="FloatingBlock" xml:space="preserve">
     <value>FloatingBlock</value>
   </data>
+  <data name="SplitButton" xml:space="preserve">
+    <value>SplitButton</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
index ff7f70f8..6963d7af 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
@@ -663,4 +663,7 @@
   <data name="FloatingBlock" xml:space="preserve">
     <value>FloatingBlock</value>
   </data>
+  <data name="SplitButton" xml:space="preserve">
+    <value>SplitButton</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
index c3c1bec7..4da16852 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
@@ -663,4 +663,7 @@
   <data name="FloatingBlock" xml:space="preserve">
     <value>漂浮块</value>
   </data>
+  <data name="SplitButton" xml:space="preserve">
+    <value>分割按钮</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/SplitButton_16x.png b/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/SplitButton_16x.png
new file mode 100644
index 00000000..80e46664
Binary files /dev/null and b/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/SplitButton_16x.png differ
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml
new file mode 100644
index 00000000..60e55413
--- /dev/null
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml
@@ -0,0 +1,39 @@
+<UserControl x:Class="HandyControlDemo.UserControl.SplitButtonDemoCtl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:hc="https://handyorg.github.io/handycontrol"
+             xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
+             xmlns:userControl="clr-namespace:HandyControlDemo.UserControl"
+             DataContext="{Binding SplitButtonDemo,Source={StaticResource Locator}}">
+    <hc:TransitioningContentControl>
+        <StackPanel Margin="32" VerticalAlignment="Center">
+            <hc:SplitButton Margin="0,0,0,10" Content="{x:Static langs:Lang.Default}" Command="{Binding SelectCmd}" CommandParameter="Command0" HorizontalAlignment="Stretch">
+                <hc:SplitButton.DropDownContent>
+                    <StackPanel>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
+                    </StackPanel>
+                </hc:SplitButton.DropDownContent>
+            </hc:SplitButton>
+            <hc:SplitButton Style="{StaticResource SplitButtonPrimary}" Margin="0,0,0,10" Content="{x:Static langs:Lang.Primary}" Command="{Binding SelectCmd}" CommandParameter="Command0" HorizontalAlignment="Stretch">
+                <hc:SplitButton.DropDownContent>
+                    <StackPanel>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
+                    </StackPanel>
+                </hc:SplitButton.DropDownContent>
+            </hc:SplitButton>
+            <hc:SplitButton Style="{StaticResource SplitButtonWarning}" Margin="0,0,0,10" Content="{x:Static langs:Lang.Warning}" HitMode="Hover" HorizontalAlignment="Stretch">
+                <hc:SplitButton.DropDownContent>
+                    <StackPanel>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
+                        <MenuItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
+                    </StackPanel>
+                </hc:SplitButton.DropDownContent>
+            </hc:SplitButton>
+        </StackPanel>
+    </hc:TransitioningContentControl>
+</UserControl>
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml.cs b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml.cs
new file mode 100644
index 00000000..6c369070
--- /dev/null
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml.cs
@@ -0,0 +1,17 @@
+using System.Windows;
+
+namespace HandyControlDemo.UserControl
+{
+    public partial class SplitButtonDemoCtl
+    {
+        public SplitButtonDemoCtl()
+        {
+            InitializeComponent();
+        }
+
+        private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
+        {
+            MessageBox.Show("123");
+        }
+    }
+}
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml
index e5d1313c..4f903dd1 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml
@@ -225,6 +225,11 @@
                                 <Image Source="../../Resources/Img/LeftMainContent/GoToTop_16x.png"/>
                             </hc:EdgeElement.LeftContent>
                         </ListBoxItem>
+                        <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.SplitButtonDemoCtl}" Content="{x:Static langs:Lang.SplitButton}">
+                            <hc:EdgeElement.LeftContent>
+                                <Image Source="../../Resources/Img/LeftMainContent/SplitButton_16x.png"/>
+                            </hc:EdgeElement.LeftContent>
+                        </ListBoxItem>
                         <ListBoxItem Tag="{x:Static data:MessageToken.ButtonGroupDemoCtl}" Content="{x:Static langs:Lang.ButtonGroup}">
                             <hc:EdgeElement.LeftContent>
                                 <Image Source="../../Resources/Img/LeftMainContent/ButtonGroup_16x.png"/>
@@ -330,7 +335,7 @@
                                 <Image Source="../../Resources/Img/LeftMainContent/TextBlock_16x.png"/>
                             </hc:EdgeElement.LeftContent>
                         </ListBoxItem>
-                        <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.RunningBlockDemoCtl}" Content="{x:Static langs:Lang.RunningBlock}">
+                        <ListBoxItem Tag="{x:Static data:MessageToken.RunningBlockDemoCtl}" Content="{x:Static langs:Lang.RunningBlock}">
                             <hc:EdgeElement.LeftContent>
                                 <Image Source="../../Resources/Img/LeftMainContent/Dynamic_16x.png"/>
                             </hc:EdgeElement.LeftContent>
diff --git a/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/SplitButtonDemoViewModel.cs b/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/SplitButtonDemoViewModel.cs
new file mode 100644
index 00000000..43a77e8f
--- /dev/null
+++ b/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/SplitButtonDemoViewModel.cs
@@ -0,0 +1,17 @@
+using System;
+using GalaSoft.MvvmLight;
+using HandyControl.Controls;
+#if netle40
+using GalaSoft.MvvmLight.Command;
+#else
+using GalaSoft.MvvmLight.CommandWpf;
+# endif
+
+namespace HandyControlDemo.ViewModel
+{
+    public class SplitButtonDemoViewModel : ViewModelBase
+    {
+        public RelayCommand<string> SelectCmd => new Lazy<RelayCommand<string>>(() =>
+            new RelayCommand<string>(str => Growl.Info(str))).Value;
+    }
+}
diff --git a/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs b/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
index d8e4b51f..3910168c 100644
--- a/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
+++ b/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
@@ -39,6 +39,7 @@ namespace HandyControlDemo.ViewModel
             SimpleIoc.Default.Register<CardDemoViewModel>();
             SimpleIoc.Default.Register<SpriteDemoViewModel>();
             SimpleIoc.Default.Register<NotificationDemoViewModel>();
+            SimpleIoc.Default.Register<SplitButtonDemoViewModel>();
         }
 
         public static ViewModelLocator Instance => new Lazy<ViewModelLocator>(() =>
@@ -94,6 +95,8 @@ namespace HandyControlDemo.ViewModel
 
         public NotificationDemoViewModel NotificationDemo => ServiceLocator.Current.GetInstance<NotificationDemoViewModel>();
 
+        public SplitButtonDemoViewModel SplitButtonDemo => ServiceLocator.Current.GetInstance<SplitButtonDemoViewModel>();
+
         #endregion
     }
 }
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Controls/Block/FloatingBlock.cs b/src/Shared/HandyControl_Shared/Controls/Block/FloatingBlock.cs
index 5901c7ed..f838f2bf 100644
--- a/src/Shared/HandyControl_Shared/Controls/Block/FloatingBlock.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Block/FloatingBlock.cs
@@ -101,13 +101,13 @@ namespace HandyControl.Controls
         {
             if (!(d is UIElement target)) return;
 
-            target.RemoveHandler(PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(Target_PreviewMouseLeftButtonDown));
-            target.RemoveHandler(PreviewMouseLeftButtonUpEvent, new MouseButtonEventHandler(Target_PreviewMouseLeftButtonUp));
+            target.PreviewMouseLeftButtonDown -= Target_PreviewMouseLeftButtonDown;
+            target.PreviewMouseLeftButtonUp -= Target_PreviewMouseLeftButtonUp;
 
             if (e.NewValue != null)
             {
-                target.AddHandler(PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(Target_PreviewMouseLeftButtonDown));
-                target.AddHandler(PreviewMouseLeftButtonUpEvent, new MouseButtonEventHandler(Target_PreviewMouseLeftButtonUp));
+                target.PreviewMouseLeftButtonDown += Target_PreviewMouseLeftButtonDown;
+                target.PreviewMouseLeftButtonUp += Target_PreviewMouseLeftButtonUp;
             }
         }
 
diff --git a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs
new file mode 100644
index 00000000..0bdd19e7
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs
@@ -0,0 +1,81 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Input;
+using HandyControl.Data;
+using HandyControl.Data.Enum;
+
+namespace HandyControl.Controls
+{
+    public class SplitButton : ButtonBase
+    {
+        public static readonly DependencyProperty HitModeProperty = DependencyProperty.Register(
+            "HitMode", typeof(MouseHitMode), typeof(SplitButton), new PropertyMetadata(default(MouseHitMode)));
+
+        public MouseHitMode HitMode
+        {
+            get => (MouseHitMode) GetValue(HitModeProperty);
+            set => SetValue(HitModeProperty, value);
+        }
+
+        public static readonly DependencyProperty MaxDropDownHeightProperty = DependencyProperty.Register(
+            "MaxDropDownHeight", typeof(double), typeof(SplitButton), new PropertyMetadata(SystemParameters.PrimaryScreenHeight / 3.0));
+
+        public double MaxDropDownHeight
+        {
+            get => (double) GetValue(MaxDropDownHeightProperty);
+            set => SetValue(MaxDropDownHeightProperty, value);
+        }
+
+        public static readonly DependencyProperty IsDropDownOpenProperty = DependencyProperty.Register(
+            "IsDropDownOpen", typeof(bool), typeof(SplitButton), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        public bool IsDropDownOpen
+        {
+            get => (bool) GetValue(IsDropDownOpenProperty);
+            set => SetValue(IsDropDownOpenProperty, value);
+        }
+
+        public static readonly DependencyProperty DropDownContentProperty = DependencyProperty.Register(
+            "DropDownContent", typeof(object), typeof(SplitButton), new PropertyMetadata(default(object)));
+
+        public object DropDownContent
+        {
+            get => GetValue(DropDownContentProperty);
+            set => SetValue(DropDownContentProperty, value);
+        }
+
+        public SplitButton()
+        {
+            AddHandler(MenuItem.ClickEvent, new RoutedEventHandler(ItemsOnClick));
+        }
+
+        private void ItemsOnClick(object sender, RoutedEventArgs e)
+        {
+            if (e.OriginalSource is MenuItem)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.FalseBox);
+            }
+        }
+
+        protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
+        {
+            base.OnPreviewMouseLeftButtonDown(e);
+
+            if (HitMode == MouseHitMode.Hover)
+            {
+                e.Handled = true;
+            }
+        }
+
+        protected override void OnMouseEnter(MouseEventArgs e)
+        {
+            base.OnMouseEnter(e);
+
+            if (HitMode == MouseHitMode.Hover)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.TrueBox);
+            }
+        }
+    }
+}
diff --git a/src/Shared/HandyControl_Shared/Controls/Input/DateTimePicker.cs b/src/Shared/HandyControl_Shared/Controls/Input/DateTimePicker.cs
index 55427b99..843a7d3b 100644
--- a/src/Shared/HandyControl_Shared/Controls/Input/DateTimePicker.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Input/DateTimePicker.cs
@@ -147,7 +147,6 @@ namespace HandyControl.Controls
                         dp._calendarWithClock.Focus();
                     });
                 }
-
             }
         }
 
diff --git a/src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs b/src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs
index 64c0cf75..fe84b94a 100644
--- a/src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs
@@ -4,6 +4,7 @@ using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Markup;
 using System.Windows.Media.Animation;
 using HandyControl.Data;
 using HandyControl.Tools;
@@ -14,7 +15,8 @@ namespace HandyControl.Controls
     [TemplateVisualState(GroupName = PresentationGroup, Name = DefaultTransitionState)]
     [TemplatePart(Name = PreviousContentPresentationSitePartName, Type = typeof(ContentControl))]
     [TemplatePart(Name = CurrentContentPresentationSitePartName, Type = typeof(ContentControl))]
-    public class TransitioningContentControl : ContentControl
+    [ContentProperty("Content")]
+    public class TransitioningContentControl : Control
     {
         private Storyboard _currentTransition;
 
@@ -76,11 +78,28 @@ namespace HandyControl.Controls
             VisualStateManager.GoToState(this, Transition, true);
         }
 
-        protected override void OnContentChanged(object oldContent, object newContent)
-        {
-            base.OnContentChanged(oldContent, newContent);
+        public static readonly DependencyProperty ContentProperty = DependencyProperty.Register(
+            "Content", typeof(object), typeof(TransitioningContentControl), new PropertyMetadata(default(object), OnContentChanged));
 
-            StartTransition(oldContent, newContent);
+        private static void OnContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var ctl = (TransitioningContentControl) d;
+            ctl.StartTransition(e.OldValue, e.NewValue);
+        }
+
+        public static readonly DependencyProperty ContentTemplateProperty = DependencyProperty.Register(
+            "ContentTemplate", typeof(DataTemplate), typeof(TransitioningContentControl), new PropertyMetadata(default(DataTemplate)));
+
+        public DataTemplate ContentTemplate
+        {
+            get => (DataTemplate) GetValue(ContentTemplateProperty);
+            set => SetValue(ContentTemplateProperty, value);
+        }
+
+        public object Content
+        {
+            get => GetValue(ContentProperty);
+            set => SetValue(ContentProperty, value);
         }
 
         [SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "newContent", Justification = "Should be used in the future.")]
diff --git a/src/Shared/HandyControl_Shared/Controls/Rate/Rate.cs b/src/Shared/HandyControl_Shared/Controls/Rate/Rate.cs
index 37453c8b..45665b8d 100644
--- a/src/Shared/HandyControl_Shared/Controls/Rate/Rate.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Rate/Rate.cs
@@ -132,11 +132,8 @@ namespace HandyControl.Controls
             set => SetValue(IsReadOnlyProperty, value);
         }
 
-        private void RateItemValueChanged(object sender, RoutedEventArgs e)
-        {
-            Value =
-                (from RateItem item in Items where item.IsSelected select item.IsHalf ? 0.5 : 1).Sum();
-        }
+        private void RateItemValueChanged(object sender, RoutedEventArgs e) =>
+            Value = (from RateItem item in Items where item.IsSelected select item.IsHalf ? 0.5 : 1).Sum();
 
         private void RateItemSelectedChanged(object sender, RoutedEventArgs e)
         {
@@ -163,15 +160,9 @@ namespace HandyControl.Controls
             }
         }
 
-        protected override bool IsItemItsOwnContainerOverride(object item)
-        {
-            return item is RateItem;
-        }
+        protected override bool IsItemItsOwnContainerOverride(object item) => item is RateItem;
 
-        protected override DependencyObject GetContainerForItemOverride()
-        {
-            return new RateItem();
-        }
+        protected override DependencyObject GetContainerForItemOverride() => new RateItem();
 
         private void OnApplyTemplateInternal()
         {
@@ -242,9 +233,6 @@ namespace HandyControl.Controls
             }
         }
 
-        public void Reset()
-        {
-            Value = DefaultValue;
-        }
+        public void Reset() => Value = DefaultValue;
     }
 }
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Data/Enum/MouseHitMode.cs b/src/Shared/HandyControl_Shared/Data/Enum/MouseHitMode.cs
new file mode 100644
index 00000000..6232328a
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Data/Enum/MouseHitMode.cs
@@ -0,0 +1,8 @@
+namespace HandyControl.Data.Enum
+{
+    public enum MouseHitMode
+    {
+        Click,
+        Hover
+    }
+}
diff --git a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index 71548ee5..34d3cec7 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -21,6 +21,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\RectangleAttach.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\TextBlockAttach.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Block\FloatingBlock.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Controls\Button\SplitButton.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Growl\GrowlWindow.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Image\ImageBlock.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Other\Magnifier.cs" />
@@ -34,13 +35,16 @@
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Slider\RangeSlider\RangeThumb.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Slider\RangeSlider\TwoWayRangeBase.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Block\RunningBlock.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Data\Enum\MouseHitMode.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Data\Enum\ShowAnimation.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Data\Enum\NotifyIconInfoType.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Interactivity\Commands\CloseWindowCommand.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Interactivity\Commands\OpenLinkCommand.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\BorderCircularClipConverter.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\CornerRadiusSplitConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Number2PercentageConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\RectangleCircularConverter.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ThicknessSplitConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\FrameworkElementExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\StringExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\ValueExtension.cs" />
@@ -391,6 +395,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)Themes\Styles\Base\SplitButtonBaseStyle.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)Themes\Styles\Base\ToggleBlockBaseStyle.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -779,6 +787,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)Themes\Styles\SplitButton.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)Themes\Styles\Sprite.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -851,4 +863,10 @@
   <ItemGroup>
     <Folder Include="$(MSBuildThisFileDirectory)Controls\Growl\" />
   </ItemGroup>
+  <ItemGroup>
+    <Page Update="E:\Work\GitHub\HandyControl\src\Shared\HandyControl_Shared\Themes\Styles\Base\SplitButtonBaseStyle.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
index ac9c5fda..cb0c9fda 100644
--- a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
@@ -20,5 +20,7 @@
     <converter:Object2VisibilityConverter x:Key="Object2VisibilityConverter"/>
     <converter:Number2PercentageConverter x:Key="Number2PercentageConverter"/>
     <converter:RectangleCircularConverter x:Key="RectangleCircularConverter"/>
+    <converter:ThicknessSplitConverter x:Key="ThicknessSplitConverter"/>
+    <converter:CornerRadiusSplitConverter x:Key="CornerRadiusSplitConverter"/>
     <MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter" />
 </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 ce60374a..894b03ad 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DatePickerBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -183,13 +182,13 @@
     </ControlTemplate>
 
     <Style x:Key="DatePickerExtendBaseStyle" BasedOn="{StaticResource DatePickerBaseStyle}" TargetType="DatePicker">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
         <Setter Property="Template" Value="{StaticResource DatePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource DatePickerExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -351,7 +350,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource DatePickerPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
index 2eb9d802..e9ad4187 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/DateTimePickerBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -162,13 +161,13 @@
     </ControlTemplate>
 
     <Style x:Key="DateTimePickerExtendBaseStyle" BasedOn="{StaticResource DateTimePickerBaseStyle}" TargetType="controls:DateTimePicker">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
         <Setter Property="Template" Value="{StaticResource DateTimePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource DateTimePickerExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -330,7 +329,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource DateTimePickerPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
index b01ad9fd..ff1162ae 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml
@@ -1,8 +1,7 @@
 <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:system="clr-namespace:System;assembly=mscorlib">
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
@@ -131,12 +130,12 @@
     <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="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource NumericUpDownExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource NumericUpDownExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -270,7 +269,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource NumericUpDownPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
index 6028041e..e06d7e23 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PasswordBoxBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -115,7 +114,7 @@
     </ControlTemplate>
 
     <Style x:Key="PasswordBoxExtendBaseStyle" BasedOn="{StaticResource PasswordBoxBaseStyle}" TargetType="PasswordBox">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
         <Setter Property="controls:InfoElement.ContentHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="controls:PasswordBoxAttach.IsMonitoring" Value="True"/>
@@ -123,7 +122,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource PasswordBoxExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -291,7 +290,7 @@
         <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
         <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
         <Setter Property="VerticalContentAlignment" Value="Center"/>
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <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}"/>
@@ -301,7 +300,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource PasswordBoxPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/ProgressButtonBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/ProgressButtonBaseStyle.xaml
index 5f1b92ff..c5606579 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/ProgressButtonBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/ProgressButtonBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib">
+                    xmlns:controls="clr-namespace:HandyControl.Controls">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="ToggleButtonBaseStyle.xaml"/>
@@ -32,7 +31,7 @@
                 <ControlTemplate TargetType="controls:ProgressButton">
                     <Border x:Name="Chrome" CornerRadius="{Binding Path=(controls:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}">
                         <controls:SimplePanel>
-                            <ProgressBar x:Name="ProgressBar" Height="{x:Static system:Double.NaN}" Value="{TemplateBinding Progress}" Maximum="100" Visibility="Collapsed" Style="{TemplateBinding ProgressStyle}"/>
+                            <ProgressBar x:Name="ProgressBar" Height="Auto" Value="{TemplateBinding Progress}" Maximum="100" Visibility="Collapsed" Style="{TemplateBinding ProgressStyle}"/>
                             <ContentPresenter Name="UnCheckedElement"  Margin="{TemplateBinding Padding}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                             <ContentPresenter Name="CheckedElement" Margin="{TemplateBinding Padding}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Visibility="Collapsed" Content="{Binding Path=(controls:StatusSwitchElement.CheckedElement),RelativeSource={RelativeSource TemplatedParent}}"/>
                         </controls:SimplePanel>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
index f79bfddd..5f40254b 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SearchBarBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -109,13 +108,13 @@
     </ControlTemplate>
 
     <Style x:Key="SearchBarExtendBaseStyle" BasedOn="{StaticResource SearchBarBaseStyle}" TargetType="controls:SearchBar">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
         <Setter Property="Template" Value="{StaticResource SearchBarExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource SearchBarExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -249,7 +248,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource SearchBarPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml
new file mode 100644
index 00000000..b173b635
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml
@@ -0,0 +1,85 @@
+<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">
+
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="MenuBaseStyle.xaml"/>
+        <ResourceDictionary Source="../ToggleButton.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="SplitButtonBaseStyle" BasedOn="{StaticResource BaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Height" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
+        <Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
+        <Setter Property="Foreground" Value="{DynamicResource TextIconBrush}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+        <Setter Property="HorizontalContentAlignment" Value="Center"/>
+        <Setter Property="VerticalContentAlignment" Value="Center"/>
+        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="controls:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="controls:SplitButton">
+                    <controls:SimplePanel x:Name="templateRoot">
+                        <Border Background="{TemplateBinding Background}" CornerRadius="{Binding Path=(controls:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}"/>
+                        <Border BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" CornerRadius="{Binding Path=(controls:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}">
+                            <Grid>
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition/>
+                                    <ColumnDefinition Width="Auto"/>
+                                </Grid.ColumnDefinitions>
+                                <StackPanel Orientation="Horizontal" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}">
+                                    <Path x:Name="PathMain" Width="{TemplateBinding controls:IconElement.Width}" Height="{TemplateBinding controls:IconElement.Height}" Fill="{TemplateBinding Foreground}" SnapsToDevicePixels="True" Stretch="Uniform" Data="{TemplateBinding controls:IconElement.Geometry}"/>
+                                    <ContentPresenter x:Name="ContentPresenterMain" RecognizesAccessKey="True" VerticalAlignment="Center" Margin="6,0,0,0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                                </StackPanel>
+                                <ToggleButton x:Name="PART_Arrow" Foreground="{TemplateBinding Foreground}" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Width="22" Height="Auto" Padding="0,10,8,10" HorizontalContentAlignment="Left" Grid.Column="1" Style="{StaticResource ToggleButtonIconTransparent}" controls:IconSwitchElement.GeometrySelected="{StaticResource UpGeometry}" controls:IconElement.Geometry="{StaticResource DownGeometry}"/>
+                            </Grid>
+                        </Border>
+                        <Popup AllowsTransparency="true" StaysOpen="False" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="Fade"  Placement="Bottom">
+                            <Border CornerRadius="{Binding Path=(controls:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=templateRoot}" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                                <ScrollViewer Margin="0,4" x:Name="DropDownScrollViewer">
+                                    <controls:SimplePanel RenderOptions.ClearTypeHint="Enabled">
+                                        <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
+                                            <Rectangle x:Name="opaqueRect" Fill="{Binding Background, ElementName=dropDownBorder}" Height="{Binding ActualHeight, ElementName=dropDownBorder}" Width="{Binding ActualWidth, ElementName=dropDownBorder}"/>
+                                        </Canvas>
+                                        <ContentPresenter ContentSource="DropDownContent"/>
+                                    </controls:SimplePanel>
+                                </ScrollViewer>
+                            </Border>
+                        </Popup>
+                    </controls:SimplePanel>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="Content" Value="{x:Null}">
+                            <Setter Property="Visibility" Value="Collapsed" TargetName="ContentPresenterMain"/>
+                        </Trigger>
+                        <Trigger Property="controls:IconElement.Geometry" Value="{x:Null}">
+                            <Setter Property="Visibility" Value="Collapsed" TargetName="PathMain"/>
+                            <Setter Property="Margin" Value="0" TargetName="ContentPresenterMain"/>
+                        </Trigger>
+                        <MultiTrigger>
+                            <MultiTrigger.Conditions>
+                                <Condition Property="HitMode" Value="Click"/>
+                                <Condition Property="IsChecked" Value="True" SourceName="PART_Arrow"/>
+                            </MultiTrigger.Conditions>
+                            <Setter Property="IsDropDownOpen" Value="True"/>
+                        </MultiTrigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+        <Style.Triggers>
+            <Trigger Property="IsMouseOver" Value="True">
+                <Setter Property="Opacity" Value=".9"/>
+            </Trigger>
+            <Trigger Property="IsPressed" Value="True">
+                <Setter Property="Opacity" Value=".6"/>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="False">
+                <Setter Property="Opacity" Value="0.4"/>
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+</ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
index f91ce695..a4a2fa47 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -130,12 +129,12 @@
     <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="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="Template" Value="{StaticResource TextBoxExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource TextBoxExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -265,7 +264,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource TextBoxPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
index aebdd389..ae115ada 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/TimePickerBaseStyle.xaml
@@ -1,7 +1,6 @@
 <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:system="clr-namespace:System;assembly=mscorlib"
                     xmlns:interactivity="clr-namespace:HandyControl.Interactivity">
 
     <ResourceDictionary.MergedDictionaries>
@@ -162,13 +161,13 @@
     </ControlTemplate>
 
     <Style x:Key="TimePickerExtendBaseStyle" BasedOn="{StaticResource TimePickerBaseStyle}" TargetType="controls:TimePicker">
-        <Setter Property="Height" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="Height" Value="Auto"/>
         <Setter Property="controls:InfoElement.Symbol" Value="●"/>
         <Setter Property="Template" Value="{StaticResource TimePickerExtendTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource TimePickerExtendLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
@@ -330,7 +329,7 @@
         <Style.Triggers>
             <Trigger Property="controls:InfoElement.TitleAlignment" Value="Left">
                 <Setter Property="Template" Value="{StaticResource TimePickerPlusLeftTemplate}"/>
-                <Setter Property="Width" Value="{x:Static system:Double.NaN}"/>
+                <Setter Property="Width" Value="Auto"/>
             </Trigger>
         </Style.Triggers>
     </Style>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/SplitButton.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/SplitButton.xaml
new file mode 100644
index 00000000..3e3ba2dc
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/SplitButton.xaml
@@ -0,0 +1,42 @@
+<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">
+
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="Base/SplitButtonBaseStyle.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Style.Triggers>
+            <Trigger Property="IsMouseOver" Value="True">
+                <Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
+            </Trigger>
+            <Trigger Property="IsPressed" Value="True">
+                <Setter Property="Background" Value="{DynamicResource BorderBrush}"/>
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+    <Style x:Key="SplitButtonPrimary"  BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource PrimaryBrush}"/>
+    </Style>
+
+    <Style x:Key="SplitButtonSuccess"  BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource SuccessBrush}"/>
+    </Style>
+
+    <Style x:Key="SplitButtonInfo"  BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource InfoBrush}"/>
+    </Style>
+
+    <Style x:Key="SplitButtonWarning"  BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource WarningBrush}"/>
+    </Style>
+
+    <Style x:Key="SplitButtonDanger"  BasedOn="{StaticResource SplitButtonBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource DangerBrush}"/>
+    </Style>
+
+</ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Style.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Style.xaml
index aaa1a79c..46347ec2 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Style.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Style.xaml
@@ -74,6 +74,7 @@
         <ResourceDictionary Source="Sprite.xaml"/>
         <ResourceDictionary Source="Notification.xaml"/>
         <ResourceDictionary Source="FloatingBlock.xaml"/>
+        <ResourceDictionary Source="SplitButton.xaml"/>
     </ResourceDictionary.MergedDictionaries>
 
 </ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/TransitioningContentControl.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/TransitioningContentControl.xaml
index 81fb9f6a..0e238931 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/TransitioningContentControl.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/TransitioningContentControl.xaml
@@ -11,7 +11,7 @@
         <Setter Property="Template">
             <Setter.Value>
                 <ControlTemplate TargetType="controls:TransitioningContentControl">
-                    <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2">
+                    <controls:SimplePanel>
                         <VisualStateManager.VisualStateGroups>
                             <VisualStateGroup x:Name="PresentationStates">
                                 <VisualState x:Name="DefaultTransition">
@@ -76,29 +76,27 @@
                                 </VisualState>
                             </VisualStateGroup>
                         </VisualStateManager.VisualStateGroups>
-                        <controls:SimplePanel>
-                            <ContentPresenter x:Name="PreviousContentPresentationSite" Content="{x:Null}" ContentTemplate="{TemplateBinding ContentTemplate}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
-                                <ContentPresenter.RenderTransform>
-                                    <TransformGroup>
-                                        <ScaleTransform />
-                                        <SkewTransform />
-                                        <RotateTransform />
-                                        <TranslateTransform />
-                                    </TransformGroup>
-                                </ContentPresenter.RenderTransform>
-                            </ContentPresenter>
-                            <ContentPresenter x:Name="CurrentContentPresentationSite" ContentTemplate="{TemplateBinding ContentTemplate}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
-                                <ContentPresenter.RenderTransform>
-                                    <TransformGroup>
-                                        <ScaleTransform />
-                                        <SkewTransform />
-                                        <RotateTransform />
-                                        <TranslateTransform />
-                                    </TransformGroup>
-                                </ContentPresenter.RenderTransform>
-                            </ContentPresenter>
-                        </controls:SimplePanel>
-                    </Border>
+                        <ContentPresenter x:Name="PreviousContentPresentationSite" Content="{x:Null}" ContentTemplate="{TemplateBinding ContentTemplate}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
+                            <ContentPresenter.RenderTransform>
+                                <TransformGroup>
+                                    <ScaleTransform />
+                                    <SkewTransform />
+                                    <RotateTransform />
+                                    <TranslateTransform />
+                                </TransformGroup>
+                            </ContentPresenter.RenderTransform>
+                        </ContentPresenter>
+                        <ContentPresenter x:Name="CurrentContentPresentationSite" ContentTemplate="{TemplateBinding ContentTemplate}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
+                            <ContentPresenter.RenderTransform>
+                                <TransformGroup>
+                                    <ScaleTransform />
+                                    <SkewTransform />
+                                    <RotateTransform />
+                                    <TranslateTransform />
+                                </TransformGroup>
+                            </ContentPresenter.RenderTransform>
+                        </ContentPresenter>
+                    </controls:SimplePanel>
                 </ControlTemplate>
             </Setter.Value>
         </Setter>
diff --git a/src/Shared/HandyControl_Shared/Tools/Converter/CornerRadiusSplitConverter.cs b/src/Shared/HandyControl_Shared/Tools/Converter/CornerRadiusSplitConverter.cs
new file mode 100644
index 00000000..7ae70d8f
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Tools/Converter/CornerRadiusSplitConverter.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Converter
+{
+    public class CornerRadiusSplitConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is CornerRadius cornerRadius)
+            {
+                if (parameter is string str)
+                {
+                    var arr = str.Split(',');
+                    if (arr.Length != 4) return cornerRadius;
+
+                    return new CornerRadius(arr[0].Equals("1") ? cornerRadius.TopLeft : 0,
+                        arr[1].Equals("1") ? cornerRadius.TopRight : 0,
+                        arr[1].Equals("1") ? cornerRadius.BottomRight : 0,
+                        arr[1].Equals("1") ? cornerRadius.BottomLeft : 0);
+                }
+            }
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/src/Shared/HandyControl_Shared/Tools/Converter/ThicknessSplitConverter.cs b/src/Shared/HandyControl_Shared/Tools/Converter/ThicknessSplitConverter.cs
new file mode 100644
index 00000000..f024dc3a
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Tools/Converter/ThicknessSplitConverter.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Converter
+{
+    public class ThicknessSplitConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is Thickness cornerRadius)
+            {
+                if (parameter is string str)
+                {
+                    var arr = str.Split(',');
+                    if (arr.Length != 4) return cornerRadius;
+
+                    return new CornerRadius(arr[0].Equals("1") ? cornerRadius.Left : 0,
+                        arr[1].Equals("1") ? cornerRadius.Top : 0,
+                        arr[1].Equals("1") ? cornerRadius.Right : 0,
+                        arr[1].Equals("1") ? cornerRadius.Bottom : 0);
+                }
+            }
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}