C#多线程之线程池篇一APM(Asynchronous Programming Model)

　　　　　static void Main(string[] args)
        {
            int threadId = 0;

            RunOnThreadPool poolDelegate = Test;

            var t = new Thread(() => Test(out threadId));
            t.Start();
            t.Join();

            Console.WriteLine("Thread id: {0}", threadId);

            IAsyncResult r = poolDelegate.BeginInvoke(out threadId, Callback, "a delegate asynchronous call");
            r.AsyncWaitHandle.WaitOne();

            string result = poolDelegate.EndInvoke(out threadId, r);

            Console.WriteLine("线程池工作线程的: {0}", threadId);
            Console.WriteLine(result);

            Thread.Sleep(TimeSpan.FromSeconds(2));
            Console.Read();
        }

        private delegate string RunOnThreadPool(out int threadId);

        private static void Callback(IAsyncResult ar)
        {
            Console.WriteLine("开始回调...");
            Console.WriteLine("State passed to a callbak: {0}", ar.AsyncState);
            Console.WriteLine("是一个线程池线程: {0}", Thread.CurrentThread.IsThreadPoolThread);
            Console.WriteLine("线程池线程ID是: {0}", Thread.CurrentThread.ManagedThreadId);
        }


        private static string Test(out int threadId)
        {
            Console.WriteLine("开始...");
            Console.WriteLine("是一个线程池线程: {0}", Thread.CurrentThread.IsThreadPoolThread);
            Thread.Sleep(TimeSpan.FromSeconds(2));
            threadId = Thread.CurrentThread.ManagedThreadId;
            return string.Format("线程池工作线程的ID是: {0}", threadId);
        }