NavigatingCancelEventArgs.Uri Property
Gets the uniform resource identifier (URI) for the content being navigated to.
Namespace: System.Windows.Navigation
Assembly: PresentationFramework (in PresentationFramework.dll)
You can navigate to content using either an uniform resource identifier (URI) or an object. When navigating to an URI, which occurs when calling NavigationService.Navigate and NavigationService.Navigate, Uri contains the URI of the content being navigated to. Additionally, the Content property will be null.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.