private void OnDrawingAttributesReplaced(Object sender, DrawingAttributesReplacedEventArgs args)
{
// If the drawing attributes change involves Width, Height, StylusTipTransform, IgnorePressure, or FitToCurve,
// we need to invalidate
if (false == DrawingAttributes.GeometricallyEqual(args.NewDrawingAttributes, args.PreviousDrawingAttributes))
{
Invalidate();
}
}
