Occurs when an application becomes the foreground application.

Occurs when an application stops being the foreground application.

Occurs when an exception is thrown by an application but not handled.

Occurs just before an application shuts down, and cannot be canceled.

Occurs when a navigator in the application begins navigation to a content fragment, Navigation 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.

Occurs when content that was navigated to by a navigator in the application has been loaded, parsed, and has begun rendering.

Occurs when the content that is being navigated to by a navigator in the application has been found, although it may not have completed loading.

Occurs when a new navigation is requested by a navigator in the application.

Occurs when an error occurs while a navigator in the application is navigating to the requested content.

Occurs periodically during a download that is being managed by a navigator in the application to provide navigation progress information.

Occurs when the StopLoading method of a navigator in the application is called, or when a new navigation is requested by a navigator while a current navigation is in progress.

Occurs when the user ends the Windows session by logging off or shutting down the operating system.

Occurs when the Run  method of the Application object is called.