private void GestureListener_PinchDelta(object sender, PinchGestureEventArgs e)
{
  if (e.DistanceRatio < 1.0 || e.DistanceRatio > 1.4)
  {
    return;
  }
  // Create the animation for pinch
  Storyboard storyboard = new Storyboard();
  DoubleAnimation pinchXAnimation = new DoubleAnimation();
  pinchXAnimation.To = e.DistanceRatio;
  pinchXAnimation.Duration = TimeSpan.FromSeconds(0.3);
  storyboard.Children.Add(pinchXAnimation);
  Storyboard.SetTargetProperty(pinchXAnimation, new PropertyPath("GridScaling.ScaleX"));
  Storyboard.SetTarget(pinchXAnimation, GridScaling);

  DoubleAnimation pinchYAnimation = new DoubleAnimation();
  pinchYAnimation.To = e.DistanceRatio;
  pinchYAnimation.Duration = TimeSpan.FromSeconds(0.3);
  storyboard.Children.Add(pinchYAnimation);
  Storyboard.SetTargetProperty(pinchYAnimation, new PropertyPath("GridScaling.ScaleY"));
  Storyboard.SetTarget(pinchYAnimation, GridScaling);

  storyboard.Begin();
}