1 // 委托充当订阅者接口类
 2 public delegate void NotifyEventHandler(object sender);
 3 
 4 // 抽象订阅号类
 5 public class TenXun
 6 {
 7     public NotifyEventHandler NotifyEvent;
 8 
 9     public string Symbol { get; set; }
10     public string Info { get; set; }
11     public TenXun(string symbol, string info)
12     {
13         this.Symbol = symbol;
14         this.Info = info;
15     }
16 
17     // 新增对订阅号列表的维护操作
18     public void AddObserver(NotifyEventHandler ob)
19     {
20         NotifyEvent += ob;
21     }
22     // 删除对订阅号列表的维护操作
23     public void RemoveObserver(NotifyEventHandler ob)
24     {
25         NotifyEvent -= ob;
26     }
27     // 推送消息
28     public void Update()
29     {
30         if (NotifyEvent != null)
31         {
32             NotifyEvent(this);
33         }
34     }
35 }
36 
37 // 具体订阅号类
38 public class TenXunGame : TenXun
39 {
40     public TenXunGame(string symbol, string info)
41         : base(symbol, info)
42     {
43     }
44 }
45 
46 // 具体订阅者类
47 public class Subscriber
48 {
49     public string Name { get; set; }
50     public Subscriber(string name)
51     {
52         this.Name = name;
53     }
54 
55     public void ReceiveAndPrint(Object obj)
56     {
57         TenXun tenxun = obj as TenXun;
58 
59         if (tenxun != null)
60         {
61             Console.WriteLine("Notified {0} of {1}'s" + " Info is: {2}", Name, tenxun.Symbol, tenxun.Inf