diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/ComboBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/ComboBoxBaseStyle.xaml
index 1268ceb3..619f198d 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/ComboBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/ComboBoxBaseStyle.xaml
@@ -77,7 +77,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -151,7 +151,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -223,7 +223,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -309,7 +309,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -383,7 +383,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -455,7 +455,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -638,7 +638,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -750,7 +750,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -865,7 +865,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -997,7 +997,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -1013,7 +1013,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder_AutoComplete" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <StackPanel Name="PART_AutoCompletePanel" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -1148,7 +1148,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -1277,7 +1277,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
@@ -1293,7 +1293,7 @@
                     <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder_AutoComplete" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
                         <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
                             <hc:ToggleBlock.CheckedContent>
-                                <ScrollViewer Margin="2,2,2,0">
+                                <ScrollViewer Margin="2">
                                     <StackPanel Name="PART_AutoCompletePanel" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                 </ScrollViewer>
                             </hc:ToggleBlock.CheckedContent>
diff --git a/src/Shared/HandyControl_Shared/Themes/Theme.xaml b/src/Shared/HandyControl_Shared/Themes/Theme.xaml
index 761ca1f3..bde6f3fa 100644
--- a/src/Shared/HandyControl_Shared/Themes/Theme.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Theme.xaml
@@ -5173,7 +5173,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5245,7 +5245,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5315,7 +5315,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5397,7 +5397,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5469,7 +5469,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5539,7 +5539,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5714,7 +5714,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5824,7 +5824,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -5937,7 +5937,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -6068,7 +6068,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -6084,7 +6084,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder_AutoComplete" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<StackPanel Name="PART_AutoCompletePanel" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -6217,7 +6217,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -6345,7 +6345,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>
@@ -6361,7 +6361,7 @@
 					<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="0,0,0,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder_AutoComplete" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
 						<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
 							<hc:ToggleBlock.CheckedContent>
-								<ScrollViewer Margin="2,2,2,0">
+								<ScrollViewer Margin="2">
 									<StackPanel Name="PART_AutoCompletePanel" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
 								</ScrollViewer>
 							</hc:ToggleBlock.CheckedContent>