C# 多线程处理相关说明: WaitHandle,waitCallback, ThreadPool.QueueUserWorkItem

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最近接触C#的一个项目，里面用到了多线程处理，这里做个备忘

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  class TestThread    {                static void Main()        {            //使用WaitHandle静态方法阻止一个线程，直到一个或多个同步对象接收到信号            WaitHandle[] waitHandles = new WaitHandle[]             {            new ManualResetEvent(false),            new ManualResetEvent(false)            };            WaitCallback waitCallback = new WaitCallback(MyThreadWork);            WaitCallback waitCallback2 = new WaitCallback(MyThreadWork2);     // 增加线程工作类型            ThreadPool.QueueUserWorkItem(waitCallback, "第一个线程");            ThreadPool.QueueUserWorkItem(waitCallback, "第二个线程");            MyState myState = new MyState("第三个线程", 100, waitHandles[0]); // 增加自定义的线程参数类型            ThreadPool.QueueUserWorkItem(waitCallback2, myState);            ThreadPool.QueueUserWorkItem(waitCallback2, new MyState("第四个线程", 2, waitHandles[1]));            WaitHandle.WaitAll(waitHandles);            Console.WriteLine("MyState 的 Number 值为: {0}", myState.Number);    // 读取线程改变后的 MyState        }        public static void MyThreadWork(object state)        {            Console.WriteLine("MyThreadWork 开始启动 …… {0}", (string)state);            Thread.Sleep(1000);            Console.WriteLine("运行结束…… {0}", (string)state);        }        // use MyState class         public static void MyThreadWork2(object state)        {            MyState myState = ((MyState)state);            Console.WriteLine("MyThreadWork2 开始启动…… {0},{1}", ((MyState)state).Info, ((MyState)state).Number);            Thread.Sleep(1000);            ((MyState)state).Number += 1;      // 将 state的 Number 加 1            Console.WriteLine("运行结束…… {0},{1}", ((MyState)state).Info, ((MyState)state).Number);            ((ManualResetEvent)myState.DoneEvent).Set();        }    }    public class MyState    {        private string info;        private int number;        private WaitHandle _doneEvent;        public MyState(string info, int number, WaitHandle doneEvent)        {            this.info = info;            this.number = number;            this._doneEvent = doneEvent;        }        public string Info        {            get            {                return this.info;            }            set            {                this.info = value;            }        }        public WaitHandle DoneEvent        {            get            {                return this._doneEvent;            }        }        public int Number        {            get            {                return this.number;            }            set            {                this.number = value;            }        }    }

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