diff --git a/src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj b/src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj
index eb0867c3..1a5a3a2e 100644
--- a/src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj
+++ b/src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj
@@ -169,6 +169,7 @@
     </Resource>
   </ItemGroup>
   <ItemGroup>
+    <Page Remove="..\..\Shared\HandyControl_Shared\Themes\Styles\Base\CheckComboBoxBaseStyle.xaml" />
     <Page Remove="..\..\Shared\HandyControl_Shared\Themes\Styles\Base\ComboBoxBaseStyle.xaml" />
     <Page Remove="..\..\Shared\HandyControl_Shared\Themes\Styles\Base\TreeViewBaseStyle.xaml" />
     <Page Remove="..\..\Shared\HandyControl_Shared\Themes\Styles\DataGrid.xaml" />
diff --git a/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/CheckComboBoxBaseStyle.xaml b/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/CheckComboBoxBaseStyle.xaml
new file mode 100644
index 00000000..d441fcf2
--- /dev/null
+++ b/src/Net_40/HandyControl_Net_40/Themes/Styles/Base/CheckComboBoxBaseStyle.xaml
@@ -0,0 +1,586 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:hc="clr-namespace:HandyControl.Controls"
+                    xmlns:ex="clr-namespace:HandyControl.Tools.Extension"
+                    xmlns:themes="clr-namespace:HandyControl.Themes"
+                    xmlns:system="clr-namespace:System;assembly=System.Runtime"
+                    xmlns:interactivity="clr-namespace:HandyControl.Interactivity"
+                    xmlns:langs="clr-namespace:HandyControl.Properties.Langs">
+
+    <ResourceDictionary.MergedDictionaries>
+        <themes:SharedResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Styles/Tag.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="Tag4CheckComboBoxStyle" BasedOn="{StaticResource TagBaseStyle}" TargetType="hc:Tag">
+        <Setter Property="Margin" Value="0,3,3,0"/>
+        <Setter Property="Padding" Value="6,3,4,3"/>
+        <Setter Property="Height" Value="Auto"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="hc:Tag">
+                    <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
+                        <Grid>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition/>
+                                <ColumnDefinition Width="Auto"/>
+                            </Grid.ColumnDefinitions>
+                            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                            <Button Focusable="False" Name="ButtonClose" Visibility="{TemplateBinding ShowCloseButton,Converter={StaticResource Boolean2VisibilityConverter}}" Command="interactivity:ControlCommands.Close" Margin="10,0,0,0" Width="16" Height="16" Padding="0,4" Grid.Column="1" Style="{StaticResource ButtonIcon}" hc:IconElement.Geometry="{StaticResource CloseGeometry}" Foreground="{TemplateBinding Foreground}"/>
+                        </Grid>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True" SourceName="ButtonClose">
+                            <Setter Property="hc:IconElement.Geometry" Value="{StaticResource DeleteFillCircleGeometry}" TargetName="ButtonClose"/>
+                            <Setter Property="Padding" Value="0" TargetName="ButtonClose"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="CheckComboBoxToggleButton" TargetType="ToggleButton">
+        <Setter Property="ClickMode" Value="Release"/>
+        <Setter Property="OverridesDefaultStyle" Value="true"/>
+        <Setter Property="IsTabStop" Value="false"/>
+        <Setter Property="Focusable" Value="false"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ToggleButton">
+                    <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
+                        <Border Margin="0,0,6,0" BorderThickness="1" BorderBrush="Transparent" HorizontalAlignment="Right" SnapsToDevicePixels="true" Width="{StaticResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}">
+                            <Path Width="16" Height="9" x:Name="arrow" Data="{StaticResource DownGeometry}" Fill="{TemplateBinding BorderBrush}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                        </Border>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsChecked" Value="True">
+                            <Setter Property="Data" TargetName="arrow" Value="{StaticResource UpGeometry}"/>
+                        </Trigger>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter Property="Opacity" Value=".4"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="CheckComboBoxWatermarkToggleButton" TargetType="ToggleButton">
+        <Setter Property="ClickMode" Value="Release"/>
+        <Setter Property="OverridesDefaultStyle" Value="true"/>
+        <Setter Property="Foreground" Value="{DynamicResource ThirdlyTextBrush}"/>
+        <Setter Property="IsTabStop" Value="false"/>
+        <Setter Property="Focusable" Value="false"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ToggleButton">
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition/>
+                            <ColumnDefinition Width="30"/>
+                        </Grid.ColumnDefinitions>
+                        <Border Grid.ColumnSpan="2" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true"/>
+                        <Path Grid.Column="1" x:Name="arrow" Data="{StaticResource DownGeometry}" Stretch="Uniform" Fill="{TemplateBinding BorderBrush}" HorizontalAlignment="Center" Margin="7" VerticalAlignment="Center"/>
+                        <Border Margin="1" Grid.Column="0" Visibility="{Binding SelectedItem,RelativeSource={RelativeSource AncestorType=hc:CheckComboBox},Converter={StaticResource Object2VisibilityReConverter}}">
+                            <ContentPresenter Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                        </Border>
+                    </Grid>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsChecked" Value="True">
+                            <Setter Property="Data" TargetName="arrow" Value="{StaticResource UpGeometry}"/>
+                        </Trigger>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter Property="Opacity" Value=".4"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="CheckComboBoxItemBaseStyle" TargetType="hc:CheckComboBoxItem">
+        <Setter Property="SnapsToDevicePixels" Value="True"/>
+        <Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderBrush" Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="hc:CheckComboBoxItem">
+                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{Binding Padding,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,1,0'}" SnapsToDevicePixels="true">
+                        <CheckBox Foreground="{TemplateBinding Foreground}" HorizontalAlignment="Stretch" MinHeight="{TemplateBinding MinHeight}" FocusVisualStyle="{x:Null}" IsChecked="{Binding IsSelected,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}">
+                            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                        </CheckBox>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter Property="Background" TargetName="Bd" Value="{DynamicResource SecondaryRegionBrush}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <ControlTemplate x:Key="CheckComboBoxTemplate" TargetType="hc:CheckComboBox">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition/>
+                <ColumnDefinition Width="30"/>
+            </Grid.ColumnDefinitions>
+            <Popup x:Name="PART_Popup" PlacementTarget="{Binding ElementName=toggleButton}" StaysOpen="False" IsOpen="{Binding IsDropDownOpen,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}" AllowsTransparency="true" Grid.ColumnSpan="2" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                    <Grid Margin="0,4" ClipToBounds="False">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <hc:CheckComboBoxItem x:Name="PART_SelectAll"  Style="{TemplateBinding ItemContainerStyle}" IsEnabled="{TemplateBinding ShowSelectAllButton}" Visibility="{Binding ShowSelectAllButton,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}" HorizontalContentAlignment="Stretch" Content="{ex:Lang Key={x:Static langs:LangKeys.All}}"/>
+                        <ScrollViewer x:Name="DropDownScrollViewer" Grid.Row="1">
+                            <hc: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>
+                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            </hc:SimplePanel>
+                        </ScrollViewer>
+                    </Grid>
+                </Border>
+            </Popup>
+            <ToggleButton Grid.Column="0" x:Name="toggleButton" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}" Style="{StaticResource CheckComboBoxToggleButton}"/>
+            <Border Grid.Column="0" Margin="-1,1">
+                <WrapPanel Name="PART_Panel" Margin="5,0,5,3"/>
+            </Border>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="HasItems" Value="false">
+                <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+            </Trigger>
+            <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+                <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+            </Trigger>
+            <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false">
+                <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
+                <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
+            </Trigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <Trigger Property="IsOpen" Value="True" SourceName="PART_Popup">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsFocused" Value="True">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="false">
+                <Setter Property="Opacity" Value="0.4" TargetName="toggleButton"/>
+                <Setter Property="Opacity" Value="0.4" TargetName="PART_Panel"/>
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <Style x:Key="CheckComboBoxBaseStyle" TargetType="hc:CheckComboBox">
+        <Setter Property="TagStyle" Value="{StaticResource Tag4CheckComboBoxStyle}"/>
+        <Setter Property="SelectionMode" Value="Multiple"/>
+        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
+        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="ItemContainerStyle" Value="{StaticResource CheckComboBoxItemBaseStyle}"/>
+        <Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
+        <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
+        <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
+        <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
+        <Setter Property="Padding" Value="{StaticResource DefaultInputPadding}"/>
+        <Setter Property="Template" Value="{StaticResource CheckComboBoxTemplate}"/>
+        <Setter Property="VerticalContentAlignment" Value="Center"/>
+    </Style>
+
+    <ControlTemplate x:Key="CheckComboBoxExtendTopTemplate" TargetType="hc:CheckComboBox">
+        <Grid>
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition MinHeight="{Binding Path=(hc:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(hc:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+            </Grid.RowDefinitions>
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition/>
+                <ColumnDefinition Width="30"/>
+            </Grid.ColumnDefinitions>
+            <StackPanel Grid.ColumnSpan="2" Visibility="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
+                <TextBlock Margin="1,0,0,0" Text="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(hc:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(hc:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
+            </StackPanel>
+            <Popup x:Name="PART_Popup" Grid.Row="1" Grid.Column="0" PlacementTarget="{Binding ElementName=toggleButton}" AllowsTransparency="true" Grid.ColumnSpan="2" StaysOpen="False" IsOpen="{Binding IsDropDownOpen,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                    <Grid Margin="0,4" ClipToBounds="False">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <hc:CheckComboBoxItem x:Name="PART_SelectAll"  Style="{TemplateBinding ItemContainerStyle}" IsEnabled="{TemplateBinding ShowSelectAllButton}" Visibility="{Binding ShowSelectAllButton,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}" HorizontalContentAlignment="Stretch" Content="{ex:Lang Key={x:Static langs:LangKeys.All}}"/>
+                        <ScrollViewer x:Name="DropDownScrollViewer" Grid.Row="1">
+                            <hc: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>
+                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            </hc:SimplePanel>
+                        </ScrollViewer>
+                    </Grid>
+                </Border>
+            </Popup>
+            <ToggleButton Grid.Row="1" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" Content="{Binding Path=(hc:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Column="0" x:Name="toggleButton" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource CheckComboBoxWatermarkToggleButton}"/>
+            <Border Grid.Row="1" Grid.Column="0" Margin="1,0">
+                <WrapPanel Name="PART_Panel" Margin="3,1,3,4"/>
+            </Border>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="HasItems" Value="false">
+                <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+            </Trigger>
+            <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+                <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+            </Trigger>
+            <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false">
+                <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
+                <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
+            </Trigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <Trigger Property="IsOpen" Value="True" SourceName="PART_Popup">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsFocused" Value="True">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="false">
+                <Setter Property="Opacity" Value="0.4" TargetName="toggleButton"/>
+                <Setter Property="Opacity" Value="0.4" TargetName="PART_Panel"/>
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="CheckComboBoxExtendLeftTemplate" TargetType="hc:CheckComboBox">
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(hc:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(hc:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="{Binding Path=(hc:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ColumnDefinition/>
+                <ColumnDefinition Width="30"/>
+            </Grid.ColumnDefinitions>
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+                <TextBlock Text="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(hc:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(hc:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
+            </StackPanel>
+            <Popup Grid.Column="1" x:Name="PART_Popup" PlacementTarget="{Binding ElementName=toggleButton}" AllowsTransparency="true" Grid.ColumnSpan="2" StaysOpen="False" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                    <Grid Margin="0,4" ClipToBounds="False">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <hc:CheckComboBoxItem x:Name="PART_SelectAll"  Style="{TemplateBinding ItemContainerStyle}" IsEnabled="{TemplateBinding ShowSelectAllButton}" Visibility="{Binding ShowSelectAllButton,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}" HorizontalContentAlignment="Stretch" Content="{ex:Lang Key={x:Static langs:LangKeys.All}}"/>
+                        <ScrollViewer x:Name="DropDownScrollViewer" Grid.Row="1">
+                            <hc: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>
+                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            </hc:SimplePanel>
+                        </ScrollViewer>
+                    </Grid>
+                </Border>
+            </Popup>
+            <ToggleButton Grid.Column="1" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" Content="{Binding Path=(hc:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" x:Name="toggleButton" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource CheckComboBoxWatermarkToggleButton}"/>
+            <Border Grid.Column="1" Margin="1,0">
+                <WrapPanel Name="PART_Panel" Margin="3,1,3,4"/>
+            </Border>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="HasItems" Value="false">
+                <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+            </Trigger>
+            <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+                <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+            </Trigger>
+            <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false">
+                <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
+                <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
+            </Trigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <Trigger Property="IsOpen" Value="True" SourceName="PART_Popup">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsFocused" Value="True">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="false">
+                <Setter Property="Opacity" Value="0.4" TargetName="toggleButton"/>
+                <Setter Property="Opacity" Value="0.4" TargetName="PART_Panel"/>
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <Style x:Key="CheckComboBoxExtendBaseStyle" BasedOn="{StaticResource CheckComboBoxBaseStyle}" TargetType="hc:CheckComboBox">
+        <Setter Property="Height" Value="Auto"/>
+        <Setter Property="Template" Value="{StaticResource CheckComboBoxExtendTopTemplate}"/>
+        <Setter Property="hc:InfoElement.Symbol" Value="●"/>
+        <Setter Property="hc:InfoElement.ContentHeight" Value="{x:Static system:Double.NaN}"/>
+        <Setter Property="hc:InfoElement.MinContentHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Style.Triggers>
+            <Trigger Property="hc:InfoElement.TitlePlacement" Value="Left">
+                <Setter Property="Template" Value="{StaticResource CheckComboBoxExtendLeftTemplate}"/>
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+    <ControlTemplate x:Key="CheckComboBoxPlusTopTemplate" TargetType="hc:CheckComboBox">
+        <ControlTemplate.Resources>
+            <Storyboard x:Key="StoryboardShow">
+                <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,-18" Duration="0:0:.2"/>
+            </Storyboard>
+            <Storyboard x:Key="StoryboardHidden">
+                <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
+            </Storyboard>
+        </ControlTemplate.Resources>
+        <Grid >
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition MinHeight="{Binding Path=(hc:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(hc:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent}}"/>
+            </Grid.RowDefinitions>
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition/>
+                <ColumnDefinition Width="Auto" MinWidth="30"/>
+            </Grid.ColumnDefinitions>
+            <StackPanel Grid.ColumnSpan="2" Visibility="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal" Margin="{TemplateBinding Padding}">
+                <TextBlock Margin="1,0,0,0" Text="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(hc:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(hc:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
+            </StackPanel>
+            <Popup Grid.Row="1" Grid.Column="0" x:Name="PART_Popup" PlacementTarget="{Binding ElementName=toggleButton}" AllowsTransparency="true" Grid.ColumnSpan="2" StaysOpen="False" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                    <Grid Margin="0,4" ClipToBounds="False">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <hc:CheckComboBoxItem x:Name="PART_SelectAll"  Style="{TemplateBinding ItemContainerStyle}" IsEnabled="{TemplateBinding ShowSelectAllButton}" Visibility="{Binding ShowSelectAllButton,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}" HorizontalContentAlignment="Stretch" Content="{ex:Lang Key={x:Static langs:LangKeys.All}}"/>
+                        <ScrollViewer x:Name="DropDownScrollViewer" Grid.Row="1">
+                            <hc: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>
+                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            </hc:SimplePanel>
+                        </ScrollViewer>
+                    </Grid>
+                </Border>
+            </Popup>
+            <TextBlock Grid.Column="0" Grid.ColumnSpan="2" FontSize="12" Text="{TemplateBinding ErrorStr}" Name="TextBlockError" VerticalAlignment="Bottom" Margin="9,0,0,4" Foreground="{DynamicResource DangerBrush}" Grid.Row="1"/>
+            <ToggleButton Grid.Row="1" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" Content="{Binding Path=(hc:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" Grid.Column="0" x:Name="toggleButton" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource CheckComboBoxWatermarkToggleButton}"/>
+            <Border Grid.Row="1" Grid.Column="0" Margin="1,0">
+                <WrapPanel Name="PART_Panel" Margin="3,1,3,4"/>
+            </Border>
+            <Button Grid.Row="1" Command="interactivity:ControlCommands.Clear" Margin="0,0,26,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="1" Style="{StaticResource ButtonIcon}" Padding="0,6" hc:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{TemplateBinding BorderBrush}"/>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="HasItems" Value="false">
+                <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+            </Trigger>
+            <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+                <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+            </Trigger>
+            <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false">
+                <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
+                <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
+            </Trigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="ButtonClear"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="ShowClearButton" Value="True"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="Visibility" Value="Visible" TargetName="ButtonClear"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="ButtonClear"/>
+                    <Condition Property="ShowClearButton" Value="True"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="Visibility" Value="Visible" TargetName="ButtonClear"/>
+            </MultiTrigger>
+            <Trigger Property="IsOpen" Value="True" SourceName="PART_Popup">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsFocused" Value="True">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsError" Value="true">
+                <Setter Property="BorderBrush" Value="{DynamicResource DangerBrush}"/>
+                <Trigger.EnterActions>
+                    <BeginStoryboard Storyboard="{StaticResource StoryboardShow}"/>
+                </Trigger.EnterActions>
+                <Trigger.ExitActions>
+                    <BeginStoryboard Storyboard="{StaticResource StoryboardHidden}"/>
+                </Trigger.ExitActions>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="false">
+                <Setter Property="Opacity" Value="0.4" TargetName="toggleButton"/>
+                <Setter Property="Opacity" Value="0.4" TargetName="PART_Panel"/>
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="CheckComboBoxPlusLeftTemplate" TargetType="hc:CheckComboBox">
+        <ControlTemplate.Resources>
+            <Storyboard x:Key="StoryboardShow">
+                <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,-18" Duration="0:0:.2"/>
+            </Storyboard>
+            <Storyboard x:Key="StoryboardHidden">
+                <ThicknessAnimation Storyboard.TargetName="TextBlockError" Storyboard.TargetProperty="Margin" To="9,0,0,4" Duration="0:0:0"/>
+            </Storyboard>
+        </ControlTemplate.Resources>
+        <Grid x:Name="templateRoot" SnapsToDevicePixels="true" MinHeight="{Binding Path=(hc:InfoElement.MinContentHeight),RelativeSource={RelativeSource TemplatedParent}}" Height="{Binding Path=(hc:InfoElement.ContentHeight),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Double2GridLengthConverter}}">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="{Binding Path=(hc:InfoElement.TitleWidth),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ColumnDefinition/>
+                <ColumnDefinition Width="Auto" MinWidth="30"/>
+            </Grid.ColumnDefinitions>
+            <StackPanel VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="0,7,6,7" Visibility="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource String2VisibilityConverter}}" Orientation="Horizontal">
+                <TextBlock Text="{Binding Path=(hc:InfoElement.Title),RelativeSource={RelativeSource TemplatedParent}}"/>
+                <ContentPresenter TextElement.Foreground="{DynamicResource DangerBrush}" Margin="4,0,0,0" Content="{Binding Path=(hc:InfoElement.Symbol),RelativeSource={RelativeSource TemplatedParent}}" Visibility="{Binding Path=(hc:InfoElement.Necessary),RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}"/>
+            </StackPanel>
+            <Popup Grid.Column="1" x:Name="PART_Popup" PlacementTarget="{Binding ElementName=toggleButton}" AllowsTransparency="true" Grid.ColumnSpan="2" StaysOpen="False" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1" Background="{DynamicResource RegionBrush}">
+                    <Grid Margin="0,4" ClipToBounds="False">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <hc:CheckComboBoxItem x:Name="PART_SelectAll"  Style="{TemplateBinding ItemContainerStyle}" IsEnabled="{TemplateBinding ShowSelectAllButton}" Visibility="{Binding ShowSelectAllButton,RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource Boolean2VisibilityConverter}}" HorizontalContentAlignment="Stretch" Content="{ex:Lang Key={x:Static langs:LangKeys.All}}"/>
+                        <ScrollViewer x:Name="DropDownScrollViewer" Grid.Row="1">
+                            <hc: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>
+                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            </hc:SimplePanel>
+                        </ScrollViewer>
+                    </Grid>
+                </Border>
+            </Popup>
+            <TextBlock Grid.Column="1" Grid.ColumnSpan="2" FontSize="12" Text="{TemplateBinding ErrorStr}" Name="TextBlockError" VerticalAlignment="Bottom" Margin="9,0,0,4" Foreground="{DynamicResource DangerBrush}"/>
+            <ToggleButton Grid.Column="1" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" Content="{Binding Path=(hc:InfoElement.Placeholder),RelativeSource={RelativeSource TemplatedParent}}" x:Name="toggleButton" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource CheckComboBoxWatermarkToggleButton}"/>
+            <Border Grid.Column="1" Margin="1,0">
+                <WrapPanel Name="PART_Panel" Margin="3,1,3,4"/>
+            </Border>
+            <Button Command="interactivity:ControlCommands.Clear" Margin="0,0,26,0" Visibility="Collapsed" Name="ButtonClear" Width="16" Grid.Column="2" Style="{StaticResource ButtonIcon}" Padding="0,6" hc:IconElement.Geometry="{StaticResource DeleteFillCircleGeometry}" Foreground="{TemplateBinding BorderBrush}"/>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="HasItems" Value="false">
+                <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+            </Trigger>
+            <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+                <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=toggleButton}"/>
+            </Trigger>
+            <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false">
+                <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
+                <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
+            </Trigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="ButtonClear"/>
+                    <Condition Property="IsOpen" Value="false" SourceName="PART_Popup"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="toggleButton"/>
+                    <Condition Property="ShowClearButton" Value="True"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="Visibility" Value="Visible" TargetName="ButtonClear"/>
+            </MultiTrigger>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsMouseOver" Value="true" SourceName="ButtonClear"/>
+                    <Condition Property="ShowClearButton" Value="True"/>
+                </MultiTrigger.Conditions>
+                <Setter Property="Visibility" Value="Visible" TargetName="ButtonClear"/>
+            </MultiTrigger>
+            <Trigger Property="IsOpen" Value="True" SourceName="PART_Popup">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsFocused" Value="True">
+                <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+            </Trigger>
+            <Trigger Property="IsError" Value="true">
+                <Setter Property="BorderBrush" Value="{DynamicResource DangerBrush}"/>
+                <Trigger.EnterActions>
+                    <BeginStoryboard Storyboard="{StaticResource StoryboardShow}"/>
+                </Trigger.EnterActions>
+                <Trigger.ExitActions>
+                    <BeginStoryboard Storyboard="{StaticResource StoryboardHidden}"/>
+                </Trigger.ExitActions>
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="false">
+                <Setter Property="Opacity" Value="0.4" TargetName="toggleButton"/>
+                <Setter Property="Opacity" Value="0.4" TargetName="PART_Panel"/>
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <Style x:Key="CheckComboBoxPlusBaseStyle" BasedOn="{StaticResource CheckComboBoxExtendBaseStyle}" TargetType="hc:CheckComboBox">
+        <Setter Property="Template" Value="{StaticResource CheckComboBoxPlusTopTemplate}"/>
+        <Style.Triggers>
+            <Trigger Property="hc:InfoElement.TitlePlacement" Value="Left">
+                <Setter Property="Template" Value="{StaticResource CheckComboBoxPlusLeftTemplate}"/>
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+</ResourceDictionary>
diff --git a/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs b/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
index edd3f495..580fb268 100644
--- a/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
@@ -166,7 +166,7 @@ namespace HandyControl.Controls
             if (_isInternalAction) return;
             _isInternalAction = true;
 
-            foreach (var item in ItemContainerGenerator.Items)
+            foreach (var item in Items)
             {
                 if (ItemContainerGenerator.ContainerFromItem(item) is CheckComboBoxItem checkComboBoxItem)
                 {