public LoginPage()
 {
     this.InitializeComponent();
     SystemNavigationManagerPreview.GetForCurrentView().CloseRequested += (s, e) =>
     {
         // Code run when the window is closing
         if (_mPageArgs != null)
         {
             if (_mPageArgs.OnError != null)
             {
                 _mPageArgs.OnError("User closed the window!");
             }
         }
     };
 }