diff --git a/src/Core_GE30/HandyControl_Core_GE30/Themes/Styles/Base/ComboBoxBaseStyle.xaml b/src/Core_GE30/HandyControl_Core_GE30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
index f57cf567..c12c3416 100644
--- a/src/Core_GE30/HandyControl_Core_GE30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
+++ b/src/Core_GE30/HandyControl_Core_GE30/Themes/Styles/Base/ComboBoxBaseStyle.xaml
@@ -86,7 +86,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -152,7 +152,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -216,7 +216,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -294,7 +294,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -360,7 +360,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -424,7 +424,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -597,7 +597,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -701,7 +701,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -808,7 +808,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -932,7 +932,7 @@
                             <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 SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -1071,7 +1071,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -1192,7 +1192,7 @@
                             <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 KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                         </controls:SimplePanel>
                     </ScrollViewer>
                 </Border>
@@ -1348,4 +1348,4 @@
         </Style.Triggers>
     </Style>
 
-</ResourceDictionary>
\ No newline at end of file
+</ResourceDictionary>