The XAML SDK is an easy-to-use infrastructure with around 1000 developer focused examples for most of the Telerik UI for WPF controls.
You can also install the Telerik SDK SAMPLES BROWSER for WPF. It provides a user-friendly way of browsing through the repository, automatically connecting to GitHub for updating the examples, and it gives you the ability to directly run them or see their code.
The examples for each of the components in the suite are listed in the documentation along with a short description.