I was wondering, how are you going to remove the current content from the frame and make it display nothing? I would also like to know how you should remove the whole story from the frame?
to remove Current Content
Current Content
frame1.Content = null;
to delete all History use Navigated Event and set
History
Navigated Event
frame1.NavigationService.RemoveBackEntry();
hope this helps
Clear the whole story
while(frame1.NavigationService.RemoveBackEntry()!= null);