1 　/// <summary>
 2   /// 事(shi)件(jian)源
 3   /// </summary>
 4   internal class KeyEventArgs : EventArgs
 5   {
 6       private char keyChar;
 7       public KeyEventArgs(char keyChar)
 8           : base()
 9       {
10           this.keyChar = keyChar;
11       }
12 
13       public char KeyChar
14       {
15           get
16           {
17               return keyChar;
18           }
19       }
20   }

 1 　/// <summary>
 2     /// 事件發生的類(lei)
 3 　/// </summary>
 4     internal class KeyInputMonitor
 5     {
 6         // 創建一個(ge)委托(tuo)，返回類型為avoid，兩個(ge)參數
 7         public delegate void KeyDownEventHandler(object sender, KeyEventArgs e);
 8         // 將創建的(de)委托和(he)特定事(shi)件(jian)關聯,在這里特定的(de)事(shi)件(jian)為(wei)OnKeyDown
 9         public event KeyDownEventHandler OnKeyDown;
10 
11         public void Run()
12         {
13             bool finished = false;
14             do
15             {
16                 Console.WriteLine("Input a char");
17                 string response = Console.ReadLine();
18 
19                 char responseChar = (response == "") ? ' ' : char.ToUpper(response[0]);
20                 switch (responseChar)
21                 {
22                     case 'X':
23                         finished = true;
24                         break;
25                     default:
26                         // 得到(dao)按鍵信(xin)息的參(can)數
27                         KeyEventArgs keyEventArgs = new KeyEventArgs(responseChar);
28                         // 觸發事件
29                         OnKeyDown(this, keyEventArgs);
30                         break;
31                 }
32             } while (!finished);
33         }
34     }

 1 　/// <summary>
 2     /// 顯示(shi)中(zhong)文的接(jie)收類(lei)
 3 　/// </summary>
 4     internal class EventReceiverForChina
 5     {
 6         public EventReceiverForChina(KeyInputMonitor monitor)
 7         {
 8             // 產生(sheng)一個委托實例并添(tian)加到KeyInputMonitor產生(sheng)的(de)事件列表(biao)中
 9             monitor.OnKeyDown += new KeyInputMonitor.KeyDownEventHandler(this.Echo);
10         }
11         private void Echo(object sender, KeyEventArgs e)
12         {
13           Console.WriteLine("您輸入(ru)的字(zi)條是: {0}", e.KeyChar);
14         }
15     }

1         // 實(shi)例化一個事件發(fa)送器,并聲(sheng)明(ming)一個EventReceiverForChina類型的訂閱者
2   KeyInputMonitor monitor = new KeyInputMonitor();
3   EventReceiverForChina eventReceiverForChina = new EventReceiverForChina(monitor);
4 　monitor.Run();