MultiThreading异步

Question

为什么这段代码没有到达Console.WriteLine(“其他线程已经完成！”)；？这段代码来自专业C# 5.0和.NET 4.5框架书，第717-718页。

        private static AutoResetEvent waitHandle = new AutoResetEvent(false);

    static void Main(string[] args)
    {
        Console.WriteLine("ID of thread in Main(): {0}", Thread.CurrentThread.ManagedThreadId);
        AddParms data = new AddParms(3, 4);
        Thread t = new Thread(new ParameterizedThreadStart(Add));
        t.Start(data);

        waitHandle.WaitOne();
        Console.WriteLine("Other thread is done!");
        Console.ReadLine();
    }

    private static void Add(object data)
    {
        Console.WriteLine("ID of thread in Add(): {0}", Thread.CurrentThread.ManagedThreadId);

        AddParms ap = (AddParms)data;
        Console.WriteLine("{0} + {1} = {2}", ap.A, ap.B, ap.A + ap.B);
    }

Answer 1

waitHandle.WaitOne();

此行导致执行停止，直到设置了等待句柄。提供的代码从不设置等待句柄，因此代码会无限期地阻塞。