The NavigationService type exposes the following members.
|FragmentNavigation||Occurs when navigation to a content fragment begins.|
|Navigated||Occurs when the content that is being navigated to has been found and is available.|
|Navigating||Occurs when a new navigation is requested.|
|NavigationFailed||Occurs when an error is encountered while navigating to the requested content.|
|NavigationStopped||Occurs when the StopLoading method is called, or when a new navigation is requested while the current navigation is in progress.|