// important because the UWP camera stream automatically shuts down when a window is minimized
 private async void Current_VisibilityChanged(object sender, Windows.UI.Core.VisibilityChangedEventArgs args)
 {
     if (args.Visible == false)
     {
         if (_anylineScanView != null)
         {
             await _anylineScanView.StopCameraAsync();
         }
     }
     if (args.Visible == true)
     {
         _anylineScanView?.StartCamera();
     }
 }