The NavigationService is a static class that is common for the whole
application. If you want to navigate to page with different target all you need to do is just set the NavigationService.Transition.Target
to the desired frame container, where you want to put the page. Anytime you want to navigate to different RadFrameContainet you have to set the target.
As for the test project you created I couldn't find it. Actually, you cannot attach files to the forums. You can, however, start a new support ticket and attach the files there.
All the best,
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