public static MessageBoxResult Show()
        {
            _popup        = new Popup();
            _camCrosshair = new CameraCrosshair();

            double screenWidth  = Application.Current.Host.Content.ActualWidth;
            double screenHeight = Application.Current.Host.Content.ActualHeight;

            _camCrosshair.Margin = new Thickness((screenWidth / 2) - 160, (screenHeight / 2) - 160, 0, 0);

            _popup.Child  = _camCrosshair;
            _popup.IsOpen = true;

            return(MessageBoxResult.Cancel);
        }