static void Main(string[] args)
{
#region demo 1
Beverage beverage = new Espresso();
//不要调料
Console.WriteLine(beverage.getDescription() + " $ " + beverage.cost());
//
Beverage beverage2 = new Espresso();
beverage2 = new Mocha(beverage2);
Console.WriteLine(beverage2.getDescription() + " $ " + beverage2.cost());
#endregion ;
// 我买了个苹果手机
Phone phone = new ApplePhone();
// 现在想贴膜了
Decorator applePhoneWithSticker = new Sticker(phone);
// 扩展贴膜行为
applePhoneWithSticker.Print();
Console.WriteLine("----------------------\n");
// 现在我想有挂件了
Decorator applePhoneWithAccessories = new Accessories(phone);
// 扩展手机挂件行为
applePhoneWithAccessories.Print();
Console.WriteLine("----------------------\n");
// 现在我同时有贴膜和手机挂件了
Sticker sticker = new Sticker(phone);
Accessories applePhoneWithAccessoriesAndSticker = new Accessories(sticker);
applePhoneWithAccessoriesAndSticker.Print();
Console.ReadLine();
}