Inheritance: GalaSoft.MvvmLight.Messaging.MessageBase
		private void OnOrientationChanged(OrientationChangedMessage message)
		{
			switch (message.Orientation)
			{
				case PageOrientation.Landscape:
				case PageOrientation.LandscapeLeft:
				case PageOrientation.LandscapeRight:
					SystemTrayVisible = false;
					break;
				case PageOrientation.None:
				case PageOrientation.Portrait:
				case PageOrientation.PortraitDown:
				case PageOrientation.PortraitUp:
				default:
					SystemTrayVisible = true;
					break;
			}

			Orientation = message.Orientation;
            _settingsService.ScreenHeight = 800;
            _settingsService.ScreenWidth = 480;
		}