There are three major paths of travel in Windows Phone 8: within pages, between pages, and to external URIs. Navigation within pages uses controls that present different views such as Panorama and Pivot. Navigation between pages uses the navigation framework.
Navigation between Pages
The relationship of objects used to navigate between pages is shown in Figure 5-1. A single PhoneApplicationFrame is created during initialization and assigned to the Application RootFrame property. The frame reserves space for the page, application bar, and status bar. The frame also maintains a journal of page visits, lists navigation capabilities, ...