Fires when navigation bars are hidden.
The NavigationBarsHidden event's data class is EventArgs.
A WindowsUIView has Navigation Bars invoked with a right mouse button click. These bars contain buttons that perform navigation actions (‘Home’, ‘Overview’, ‘Back’ and ‘Close’), buttons that perform the IWindowsUIViewController.Flip and IWindowsUIViewController.Rotate methods (for SplitGroup containers only) and custom buttons (see the figure below):
Displaying and hiding these navigation bars fires the WindowsUIView.NavigationBarsShown or NavigationBarsHidden events respectively.