static void Main(string[] args)
{
Barbecuer boyBarbecuer = new Barbecuer();
Command bakeMutton = new BakeMuttonCommand(boyBarbecuer);
Command bakeChicken = new BakeChickenWingCommand(boyBarbecuer);
Command bakeMutton1 = new BakeMuttonCommand(boyBarbecuer);
Command bakeChicken1 = new BakeChickenWingCommand(boyBarbecuer);
Waiter girl = new Waiter();
girl.SetOrder(bakeChicken);
girl.SetOrder(bakeMutton);
girl.SetOrder(bakeChicken1);
girl.SetOrder(bakeMutton1);
girl.Notify();
girl.CancelOrder(bakeChicken1);
Console.ReadKey();
}