[Description] Occurs when navigation to a content fragment begins, which occurs immediately, if the desired fragment is in the current content, or after the source XAML content has been loaded, if the desired fragment is in different content. [Name] 
FragmentNavigation
F r a g m e n t N a v i g a t i o n
L o a d C o m p l e t e d
N a v i g a t e d
N a v i g a t i n g
N a v i g a t i o n F a i l e d
N a v i g a t i o n P r o g r e s s
N a v i g a t i o n S t o p p e d