Gets whether the navigation back within the NavigationFrame is currently possible.
true, if the navigation back within the NavigationFrame is currently possible; otherwise, false.
If an application has just launched and a view set as the NavigationFrame's NavigationFrame.Source is currently displayed, calling the NavigationFrame.GoBack method will do nothing. The CanGoBack property allows you to determine whether there is currently a view to navigate back to. See the NavigationFrame.GoBack method to learn more.