internal void Cut()
{
ms = new MemoryStream();
BinaryFormatter bf = new BinaryFormatter();
List <Shape> cutShapes = new List <Shape>();
foreach (var item in Selection.ToList())
{
if (ShapeList.Contains(item))
{
Selection.Clear();
ShapeList.Remove(item);
cutShapes.Add(item);
}
}
bf.Serialize(ms, cutShapes);
Clipboard.SetData("My Format", ms);
}