/// <summary>
/// To avoid corrupted shape.
/// Corrupted shape is produced when delete or cut a shape programmatically, but then users undo it.
/// After that, most of operations on corrupted shapes will throw an exception.
/// One solution for this is to re-allocate its memory: simply cut/copy and paste.
/// </summary>
/// <param name="shape"></param>
/// <returns></returns>
private static PowerPoint.Shape CutPasteShape(PowerPoint.Shape shape)
{
shape.Cut();
shape = PowerPointCurrentPresentationInfo.CurrentSlide.Shapes.Paste()[1];
return shape;
}