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ScrolleViewer ComputedVerticalScrollBarVisibility Dependency Property

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I recently came a cross a request where I had to show a WPF control only when the Vertical Delete repeated wordbar was visible, after looking at ScrollViewer on MSDN I found that it has a dependency property that indicates whether the vertical scrollbar is visible (a similar property exists for horizontal scrollbar): ComputedVerticalScrollBarVisibility

Here is a sample XAML I using this property:


 <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">  
             <Button Command="{Binding Command}"  
                     Visibility="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type ScrollViewer}}, 



      Path=ComputedVerticalScrollBarVisibility}"/>  
     </ScrollViewer>
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