public static void Main(string[] args)
{
// need a prototype manager
PrototypeManager manager = new PrototypeManager();
// prototype manager registers a few prototype
manager.loadCache();
// prototype manager can now be used as factory object
Shape clonedShape1 = manager.GetShape("1");
clonedShape1.Draw();
Shape clonedShape2 = manager.GetShape("2");
clonedShape2.Draw();
Shape clonedShape3 = manager.GetShape("3");
clonedShape3.Draw();
}