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    copied!<p>You can use power of Binding without additional C# code</p> <pre><code>&lt;Grid&gt; &lt;local:UserControl1 x:Name="uc1" HorizontalAlignment="Left" VerticalAlignment="Top"/&gt; &lt;StackPanel&gt; &lt;local:UserControl2 x:Name="uc2" Visibility="{Binding ElementName=uc1, Path=SelectedItem, Converter={StaticResource VisibilityConverter}}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="150,29,0,0" /&gt; &lt;local:UserControl3 x:Name="uc3" Visibility="{Binding ElementName=uc2, Path=SelectedItem, Converter={StaticResource VisibilityConverter}}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="340,29,0,0"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre> <p>or with data triggers:</p> <pre><code>&lt;Style TargetType="{x:Type Control}" x:Key="VisibilityStyle1"&gt; &lt;Setter Property="Visibility" Value="Visible" /&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding SelectedItem, ElementName=uc1}" Value="{x:Null}"&gt; &lt;Setter Property="Visibility" Value="Hidden" /&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Style TargetType="{x:Type Control}" x:Key="VisibilityStyle2"&gt; &lt;Setter Property="Visibility" Value="Visible" /&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding SelectedItem, ElementName=uc2}" Value="{x:Null}"&gt; &lt;Setter Property="Visibility" Value="Hidden" /&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Grid&gt; &lt;local:UserControl1 x:Name="uc1" HorizontalAlignment="Left" VerticalAlignment="Top"/&gt; &lt;StackPanel&gt; &lt;local:UserControl2 x:Name="uc2" Style="{DynamicResource VisibilityStyle1}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="150,29,0,0" /&gt; &lt;local:UserControl3 x:Name="uc3" tyle="{DynamicResource VisibilityStyle2}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="340,29,0,0"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre>
 

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