We are using Telerik WPF controls, after updating to version 2018.2.620.45 RadWindow as main window is not showing.
In your samples "RadWindowAsMainWindow" project is working.
After only changing 3 Telerik dlls with new version dlls ("2018.2.620.45") main window doesn't show.
I couldn't attach the project because, attaching zip files is not allowed (And I think this is another problem).
Do we have to change something in code for new versions?