Assembly: PresentationFramework (in PresentationFramework.dll)
static member GetNavigationService : dependencyObject:DependencyObject -> NavigationService
The dependencyObject parameter is a null reference (Nothing in Visual Basic).
A navigator has a NavigationService that handles content navigation. WPF has two navigators: NavigationWindow and Frame. To process navigation requests and manage navigation lifetime, a navigator uses the WPF navigation service, which is implemented as the NavigationService class. Content that is hosted by a navigator can get a reference to the navigator's NavigationService by calling the method.
returns a null reference (Nothing in Visual Basic) when the dependencyObject:
Is a NavigationWindow.
Is a Frame that:
Is not part of content that is hosted by a navigator.
WPF offers two shortcuts for acquiring a reference to the NavigationService: