Occurs when content that was navigated to has been loaded, parsed, and has begun rendering.
Assembly: PresentationFramework (in PresentationFramework.dll)
You handle if you need to discover pertinent information regarding the navigation request upon load completion. This information is available from the NavigationEventArgs object that is passed to the event handler, and includes:
The content and its uniform resource identifier (URI).
Response details (using a WebResponse object).
is not raised when the source page could not be found or loaded, in which case NavigationFailed is raised.