C#设计模式之享元模式（Flyweight）

using System;
using System.Collections;

  public class Client
   {
     public static void Main(string[] args)
      {
         /* 我的第一个 C# 程序*/
         int extrinsicstate=22;
         FlyweigrhFactory f=new FlyweigrhFactory();

         //work with different flyweight instance
         Flyweight fx=f.GetFlyweight("X");
         fx.Operation(--extrinsicstate);

         Flyweight fy=f.GetFlyweight("Y");
         fx.Operation(--extrinsicstate);

         Flyweight fz=f.GetFlyweight("Z");
         fx.Operation(--extrinsicstate);

      }
   }

 public    class FlyweigrhFactory
    {
        private Hashtable flyweights=new Hashtable();    

        public FlyweigrhFactory()
        {
            flyweights.Add("X",new ConcreteFlyweight());
            flyweights.Add("Y",new ConcreteFlyweight());
            flyweights.Add("Z",new ConcreteFlyweight());
        }

        public Flyweight GetFlyweight(string key)
        {
            return ((Flyweight)flyweights[key]);
        }
    }

    public abstract class Flyweight
    {
        abstract public void Operation(int extrinsicstate);
    }

  public  class ConcreteFlyweight:Flyweight
    {
        private string intrinsicstate="A";

        override public void Operation(int extrinsicstate)
        {
            Console.WriteLine("ConcreteFlyweight:intrinsicstate {0},extrinsicstate {1}",intrinsicstate,extrinsicstate);
        }
    }

上述代码为示例，暂存