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/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
index 347a43c1..38e214fb 100644
--- a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
+++ b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
@@ -38,7 +38,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\ChatBox.xaml.cs">
       <DependentUpon>ChatBox.xaml</DependentUpon>
     </Compile>
-    <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\CustomSplitButtonItem.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\IFull.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\InteractiveDialog.xaml.cs">
       <DependentUpon>InteractiveDialog.xaml</DependentUpon>
diff --git a/src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.xaml b/src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.xaml
index 9167c105..49a0d290 100644
--- a/src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.xaml
+++ b/src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.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:hc="https://handyorg.github.io/handycontrol"
-                    xmlns:userControl="clr-namespace:HandyControlDemo.UserControl">
+                    xmlns:hc="https://handyorg.github.io/handycontrol">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="../Basic/Geometries.xaml"/>
@@ -99,6 +98,4 @@
         <Setter Property="Padding" Value="25"/>
     </Style>
 
-    <Style BasedOn="{StaticResource ComboBoxItemBaseStyle}" TargetType="userControl:CustomSplitButtonItem"/>
-
 </ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Basic/CustomSplitButtonItem.cs b/src/Shared/HandyControlDemo_Shared/UserControl/Basic/CustomSplitButtonItem.cs
deleted file mode 100644
index 3dfadad9..00000000
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Basic/CustomSplitButtonItem.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-using System.Windows.Controls;
-using HandyControl.Controls;
-
-namespace HandyControlDemo.UserControl
-{
-    public class CustomSplitButtonItem : ComboBoxItem, ISplitButtonItem
-    {
-
-    }
-}
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml
index 58cbf87f..60e55413 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/SplitButtonDemoCtl.xaml
@@ -7,39 +7,30 @@
              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">
+            <hc:SplitButton Margin="0,0,0,10" Content="{x:Static langs:Lang.Default}" Command="{Binding SelectCmd}" CommandParameter="Command0" HorizontalAlignment="Stretch">
                 <hc:SplitButton.DropDownContent>
                     <StackPanel>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
+                        <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.Default}" Command="{Binding SelectCmd}" CommandParameter="Command0">
+            <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>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
+                        <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 Margin="0,0,0,10" Content="{x:Static langs:Lang.Default}" HitMode="Hover">
+            <hc:SplitButton Style="{StaticResource SplitButtonWarning}" Margin="0,0,0,10" Content="{x:Static langs:Lang.Warning}" HitMode="Hover" HorizontalAlignment="Stretch">
                 <hc:SplitButton.DropDownContent>
                     <StackPanel>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command1"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command2"/>
-                        <hc:SplitButtonItem Header="{x:Static langs:Lang.Title}" Command="{Binding SelectCmd}" CommandParameter="Command3"/>
-                    </StackPanel>
-                </hc:SplitButton.DropDownContent>
-            </hc:SplitButton>
-            <hc:SplitButton Margin="0,0,0,10" Content="{x:Static langs:Lang.Default}" HitMode="Hover">
-                <hc:SplitButton.DropDownContent>
-                    <StackPanel>
-                        <userControl:CustomSplitButtonItem Content="{x:Static langs:Lang.Title}"/>
-                        <userControl:CustomSplitButtonItem Content="{x:Static langs:Lang.Title}"/>
-                        <userControl:CustomSplitButtonItem Content="{x:Static langs:Lang.Title}"/>
+                        <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>
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/SplitButton.cs b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs
similarity index 79%
rename from src/Shared/HandyControl_Shared/Controls/Button/SplitButton/SplitButton.cs
rename to src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs
index 6995ab89..0bdd19e7 100644
--- a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/SplitButton.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs
@@ -7,13 +7,8 @@ using HandyControl.Data.Enum;
 
 namespace HandyControl.Controls
 {
-    [TemplatePart(Name = ElementArrow, Type = typeof(ToggleButton))]
     public class SplitButton : ButtonBase
     {
-        private const string ElementArrow = "PART_Arrow";
-
-        private ToggleButton _toggleArrow;
-
         public static readonly DependencyProperty HitModeProperty = DependencyProperty.Register(
             "HitMode", typeof(MouseHitMode), typeof(SplitButton), new PropertyMetadata(default(MouseHitMode)));
 
@@ -55,18 +50,11 @@ namespace HandyControl.Controls
             AddHandler(MenuItem.ClickEvent, new RoutedEventHandler(ItemsOnClick));
         }
 
-        public override void OnApplyTemplate()
-        {
-            base.OnApplyTemplate();
-
-            _toggleArrow = GetTemplateChild(ElementArrow) as ToggleButton;
-        }
-
         private void ItemsOnClick(object sender, RoutedEventArgs e)
         {
-            if (e.OriginalSource is ISplitButtonItem)
+            if (e.OriginalSource is MenuItem)
             {
-                SetCurrentValue(IsDropDownOpenProperty, false);
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.FalseBox);
             }
         }
 
@@ -78,10 +66,15 @@ namespace HandyControl.Controls
             {
                 e.Handled = true;
             }
-            else if (_toggleArrow != null && _toggleArrow.IsMouseOver)
+        }
+
+        protected override void OnMouseEnter(MouseEventArgs e)
+        {
+            base.OnMouseEnter(e);
+
+            if (HitMode == MouseHitMode.Hover)
             {
-                SetCurrentValue(IsDropDownOpenProperty, _toggleArrow.IsChecked != true);
-                e.Handled = true;
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.TrueBox);
             }
         }
     }
diff --git a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/ISplitButtonItem.cs b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/ISplitButtonItem.cs
deleted file mode 100644
index c0df5384..00000000
--- a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/ISplitButtonItem.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace HandyControl.Controls
-{
-    public interface ISplitButtonItem
-    {
-    }
-}
diff --git a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/SplitButtonItem.cs b/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/SplitButtonItem.cs
deleted file mode 100644
index 8f4d6b58..00000000
--- a/src/Shared/HandyControl_Shared/Controls/Button/SplitButton/SplitButtonItem.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-using System.Windows.Controls;
-
-namespace HandyControl.Controls
-{
-    public class SplitButtonItem : MenuItem, ISplitButtonItem
-    {
-        
-    }
-}
\ No newline at end of file
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/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index ae13a98c..8c3bb78b 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -21,9 +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\ISplitButtonItem.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Controls\Button\SplitButton\SplitButton.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Controls\Button\SplitButton\SplitButtonItem.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" />
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml
index 9da8e511..b173b635 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/SplitButtonBaseStyle.xaml
@@ -7,8 +7,6 @@
         <ResourceDictionary Source="../ToggleButton.xaml"/>
     </ResourceDictionary.MergedDictionaries>
 
-    <Style BasedOn="{StaticResource MenuItemBaseStyle}" TargetType="controls:SplitButtonItem"/>
-
     <Style x:Key="SplitButtonBaseStyle" BasedOn="{StaticResource BaseStyle}" TargetType="controls:SplitButton">
         <Setter Property="Height" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
@@ -36,10 +34,10 @@
                                     <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="{TemplateBinding IsDropDownOpen}" 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}"/>
+                                <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 x:Name="PART_Popup" AllowsTransparency="true" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                        <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">
@@ -60,13 +58,6 @@
                             <Setter Property="Visibility" Value="Collapsed" TargetName="PathMain"/>
                             <Setter Property="Margin" Value="0" TargetName="ContentPresenterMain"/>
                         </Trigger>
-                        <MultiTrigger>
-                            <MultiTrigger.Conditions>
-                                <Condition Property="HitMode" Value="Hover"/>
-                                <Condition Property="IsMouseOver" Value="True"/>
-                            </MultiTrigger.Conditions>
-                            <Setter Property="IsDropDownOpen" Value="True"/>
-                        </MultiTrigger>
                         <MultiTrigger>
                             <MultiTrigger.Conditions>
                                 <Condition Property="HitMode" Value="Click"/>