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:

<dataControls:RadTreeView ItemsSource="{Binding SmallSource}"

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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