Frame background, TabControl background

   
    

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Microsoft.Samples.Graphics.Transforms.SampleViewer"
    Title="Transformations"
    xmlns:my="clr-namespace:Microsoft.Samples.Graphics.Transforms"
    xmlns:examples="Microsoft.Samples.Graphics.Transforms">

  <DockPanel Background="White">
    <TabControl Background="White"  BorderBrush="Orange">
    
      <TabItem Header="Transform Example">
        <Frame Background="White" Source="TransformExample.xaml">
        </Frame>
      </TabItem>  

      <TabItem Header="RotateTransform Example">
        <Frame Background="White" Source="RotateTransformExample.xaml">
        </Frame>
      </TabItem>  
      
      <TabItem Header="ScaleTransform Example">
        <TabControl>
          <TabItem Header="Basic Examples">
            <Frame Background="White" Source="ScaleTransformExample.xaml" />
          </TabItem>
         <TabItem Header="Animation Example">
            <Frame Background="White" Source="AnimatedScaleTransformExample.xaml" />
          </TabItem>        
        </TabControl>
      </TabItem>
      
      <TabItem Header="SkewTransform Example">
        <TabControl>
          <TabItem Header="Basic Examples">
            <Frame Background="White" Source="SkewTransformExample.xaml" />
          </TabItem>
         <TabItem Header="Animation Example">
            <Frame Background="White" Source="AnimatedSkewTransformExample.xaml" />
          </TabItem>        
        </TabControl>        
      </TabItem>  
      
      <TabItem Header="TranslateTransform Example">
        <Frame Background="White" Source="TranslateTransformExample.xaml">
        </Frame>
      </TabItem>       
      
      <TabItem Header="Interactive MatrixTransform Example">
        <Frame Background="White" Source="InteractiveMatrixTransformExample.xaml">
        </Frame>
      </TabItem>      
      
      <TabItem Header="TransformCollection Example">
        <Frame Background="White" Source="TransformCollectionExample.xaml">
        </Frame>
      </TabItem>       
    
    </TabControl>
  </DockPanel>
</Window>