Page Transition Combinations
You can combine two or more built-in page transitions to create a new effect.
Add a CompositePageTransition element to combine the effects of two or more different built-in transitions.
For example, the code here sample creates a transition that slides the views diagonally (the result of combining a horizontal and vertical slide), and also fades the old views out and the new in.
XAML
<CompositePageTransition>
<CrossFade Duration="0:00:00.500" />
<PageSlide Duration="0:00:00.500" Orientation="Horizontal" />
<PageSlide Duration="0:00:00.500" Orientation="Vertical" />
</CompositePageTransition>
C#
var compositeTransition = new CompositePageTransition();
compositeTransition.PageTransitions.Add(new PageSlide(TimeSpan.FromMilliseconds(500), PageSlide.SlideAxis.Vertical));
compositeTransition.PageTransitions.Add(new PageSlide(TimeSpan.FromMilliseconds(500), PageSlide.SlideAxis.Horizontal));
compositeTransition.PageTransitions.Add(new CrossFade(TimeSpan.FromMilliseconds(500)));