//异步委托
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;namespace AsyncDelete
{class Program{public delegate int TaskesAWhileDelegate(int data, int ms);static void Main(string[] args){TaskesAWhileDelegate dl = TaskesAWhile;IAsyncResult ar = dl.BeginInvoke(1, 3000, null, null);Console.WriteLine("main主线程");while (!ar.IsCompleted){Console.Write(".");Thread.Sleep(50);}int result = dl.EndInvoke(ar);Console.WriteLine("result:{0}", result);Console.Read();}static int TaskesAWhile(int data, int ms){Console.WriteLine("TaskesAWhile started");Thread.Sleep(ms);Console.WriteLine("TaskesAWhile completed");return ++data;}}
}

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading;
 6
 7 namespace AsyncDelete
 8 {
 9     class Program
10     {
11         public delegate int TaskesAWhileDelegate(int data, int ms);
12         static void Main(string[] args)
13         {
14             TaskesAWhileDelegate dl = TaskesAWhile;
15
16             IAsyncResult ar = dl.BeginInvoke(1, 300, new AsyncCallback(MyAsyncCallback), dl);
17             Console.WriteLine("main主线程");
18             while (!ar.IsCompleted)
19             {
20                 Console.Write(".");
21                 Thread.Sleep(50);
22             }
23
24         }
25         static int TaskesAWhile(int data, int ms)
26         {
27             Console.WriteLine("TaskesAWhile started");
28             Thread.Sleep(ms);
29             Console.WriteLine("TaskesAWhile completed");
30             return ++data;
31         }
32
33         static void MyAsyncCallback(IAsyncResult asyncResult)
34         {
35             Console.WriteLine("MyAsyncCallback start");
36             Thread.Sleep(30);
37             TaskesAWhileDelegate dll = asyncResult.AsyncState as TaskesAWhileDelegate;
38             Console.WriteLine("MyAsyncCallback:{0}", dll.EndInvoke(asyncResult));
39
40
41             Console.WriteLine("MyAsyncCallback completed");
42         }
43     }
44 }