BeginInvoke()使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Xml;
using System.Threading;
namespace ConsoleApplication1

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Client application is starting!");

Thread.CurrentThread.Name = "Main Thread";

Cal cal = new Cal();

AddDelegate del = new AddDelegate(cal.Add);
        // 需要保存 IAsyncResult 对象以便后边条用EndInvoke方法时作参数传递
        IAsyncResult asyncResult = del.BeginInvoke(5, 6, null, null);

        // 做某些其它的事情，模拟需要执行 3 秒钟
        for (int i = 1; i <= 3; i++)
        {
            Thread.Sleep(TimeSpan.FromSeconds(i));
            Console.WriteLine("{0}: Client executed {1} second(s).", Thread.CurrentThread.Name, i);
        }

        // 传递 IAsyncResult 对象
        int rtnVal = del.EndInvoke(asyncResult);
        Console.WriteLine("Result: {0}\n", rtnVal);

        Console.WriteLine("\nPress any key to exit...");
        Console.ReadLine();

    }

    public delegate int AddDelegate(int a, int b);

    public class Cal
    {
        public int Add(int a, int b)
        {
            if (Thread.CurrentThread.IsThreadPoolThread)
            {
                Thread.CurrentThread.Name = "Pool Thread";
            }
            Console.WriteLine("Method invoked!");

            // 做某些其它的事情，模拟需要执行 2 秒钟
            for (int i = 0; i < 2; i++)
            {
                Thread.Sleep(TimeSpan.FromSeconds(1));
                Console.WriteLine("{0}: Add executed {1} second(s).", Thread.CurrentThread.Name, i);
            }
            Console.WriteLine("Method complete!");
            return a + b;
        }
    }
}

}