RadPhoneApplicationFrame inherits from the native PhoneApplicationFrame class
thus exposing all events that the PhoneApplicationFrame class has. RadPhoneApplicationFrame also exposes
the PageTransitionCompleted event which is fired when a transition animation ends.
Using the PageTransitionCompleted event
The PageTransitionCompleted event is fired each time
a transition animation ends. That said, this event is fired both for the transition that animates old content out of the
frame and the transition that animates new content into the frame. To understand for which transition the event is fired, the developer
can use the event arguments which are of type PageTransitionCompletedEventArgs. The PageTransitionCompletedEventArgs class exposes
the IsNewContentTransition property that, when set to true, indicates
that the transition that animates the new page has ended, and when set to false means that the transition animating the old
page content has ended.