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By applying a Telerik Theme to your Telerik controls you can easily propagate a common look and feel throughout your application. The RadTreeView makes no exception and supports the theming mechanism which is really straightforward to set.

As a first step, make sure that you have familiarized yourself with the Themes Overview topic. As a next step, you can proceed with merging the required ResourceDictionaries into your application's resources as explained in the Setting a Theme article.

Once you have completed the above steps, all you need to do is set the StyleClass property of the RadTreeView so that the TelerikTheme is applied:

<telerikDataControls:RadTreeView  x:Name="treeView"
                                  ItemsSource="{Binding Source}"
    <telerikDataControls:TreeViewDescriptor DisplayMemberPath="Name"
                                            TargetType="{x:Type local:Item}"/>

You could check how RadTreeView looks below:

TreeView Theming

You can always modify the default theme resources in order to style the control so that it perfectly fits the tone of your application. For more information, check the Create a Custom Theme topic.

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