Hi Martin,
I must say that we have not tested our WPF controls with Prism, but I don't expect to have any problems.
If you have any issue by using the approaches and guidelines in this project please feel free to contact us. We are also a big fan of composition guidance and we will treat the issue as an if it is an error on our side.
Let us know how it goes.
Best Regards,
Valentin.Stoychev
the Telerik team
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