/// <summary>
    /// 手機(jī)抽象類，即裝飾者模式中的抽象組件類
    /// </summary>
    public abstract class Phone
    {
        public abstract void Print();
    }
     /// <summary>
    /// 蘋果手機(jī)，即裝飾著模式中的具體組件類
    /// </summary>
    public class ApplePhone:Phone
    {
        /// <summary>
        /// 重寫基類方法
        /// </summary>
        public override void Print()
        {
            Console.WriteLine("開始執(zhí)行具體的對象——蘋果手機(jī)");
        }
    }
     /// <summary>
    /// 裝飾抽象類,要讓裝飾完全取代抽象組件，所以必須繼承自Photo
    /// </summary>
    public abstract class Decorator:Phone
    {
        private Phone phone;
         public Decorator(Phone p)
        {
            this.phone = p;
        }
         public override void Print()
        {
            if (phone != null)
            {
                phone.Print();
            }
        }
    }
     /// <summary>
    /// 貼膜，即具體裝飾者
    /// </summary>
    public class Sticker : Decorator
    {
        public Sticker(Phone p)
            : base(p)
        { 
        }
         public override void Print()
        {
            base.Print();
             // 添加新的行為
            AddSticker();      
        }
         /// <summary>
        /// 新的行為方法
        /// </summary>
        public void AddSticker()
        {
            Console.WriteLine("現(xiàn)在蘋果手機(jī)有貼膜了");
        }
    }
     /// <summary>
    /// 手機(jī)掛件
    /// </summary>
    public class Accessories : Decorator
    {
        public Accessories(Phone p)
            : base(p)
        {
        }
         public override void Print()
        {
            base.Print();
             // 添加新的行為
            AddAccessories();          
        }
         /// <summary>
        /// 新的行為方法
        /// </summary>
        public void AddAccessories()
        {
            Console.WriteLine("現(xiàn)在蘋果手機(jī)有漂亮的掛件了");
        }
    }

class Customer
    {
        static void Main(string[] args)
        {
            // 我買了個蘋果手機(jī)
            Phone phone = new ApplePhone();
             // 現(xiàn)在想貼膜了
            Decorator applePhoneWithSticker = new Sticker(phone);
            // 擴(kuò)展貼膜行為
            applePhoneWithSticker.Print();
            Console.WriteLine("----------------------\n");
             // 現(xiàn)在我想有掛件了
            Decorator applePhoneWithAccessories = new Accessories(phone);
            // 擴(kuò)展手機(jī)掛件行為
            applePhoneWithAccessories.Print();
            Console.WriteLine("----------------------\n");
             // 現(xiàn)在我同時有貼膜和手機(jī)掛件了
            Sticker sticker = new Sticker(phone);
            Accessories applePhoneWithAccessoriesAndSticker = new Accessories(sticker);
            applePhoneWithAccessoriesAndSticker.Print();
            Console.ReadLine();
        }

MemoryStream memoryStream = new MemoryStream(new byte[] {95,96,97,98,99});
             // 擴(kuò)展緩沖的功能
            BufferedStream buffStream = new BufferedStream(memoryStream);
             // 添加加密的功能
            CryptoStream cryptoStream = new CryptoStream(memoryStream,new AesManaged().CreateEncryptor(),CryptoStreamMode.Write);
            // 添加壓縮功能
            GZipStream gzipStream = new GZipStream(memoryStream, CompressionMode.Compress, true);