C# 多线程的等待所有线程结束的一个问题

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using System; using System.Threading;   namespace ConsoleApplication1 {     class Program     {         private static AutoResetEvent[] events;           static void Main(string[] args)         {             int threadNum = 10;             Thread[] thread = new Thread[threadNum];               events = new AutoResetEvent[threadNum];               for (int i = 0; i < threadNum; i++)             {                 var waithandler = new AutoResetEvent(false);                 events[i] = waithandler;                 ThreadStart starter = delegate                 {                     var param = new Tuple<string, AutoResetEvent>("test print:" + i, waithandler);                     Print(param);                 };                 thread[i] = new Thread(starter)                 {                     Name = "thread" + i.ToString()                 };             }               for (int i = 0; i < threadNum; i++)             {                 thread[i].Start();             }               WaitHandle.WaitAll(events);             Console.WriteLine("Completed!");             Console.Read();           }           private static void Print(object param)         {             var p = (Tuple<string, AutoResetEvent>)param;             Console.WriteLine(Thread.CurrentThread.Name + ": Begin!");             Console.WriteLine(Thread.CurrentThread.Name + ": Print" + p.Item1);             Thread.Sleep(300);             Console.WriteLine(Thread.CurrentThread.Name + ": End!");             p.Item2.Set();         }     } }

一次性地Set，其实使用ManualResetEvent就足够了。

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using System; using System.Collections.Generic; using System.Threading;   namespace ConsoleApplication1 {     class Program     {         static void Main(string[] args)         {             var waits = new List<EventWaitHandle>();             for (int i = 0; i < 10; i++)             {                 var handler = new ManualResetEvent(false);                 waits.Add(handler);                 new Thread(new ParameterizedThreadStart(Print))                 {                     Name = "thread" + i.ToString()                 }.Start(new Tuple<string, EventWaitHandle>("test print:" + i, handler));             }             WaitHandle.WaitAll(waits.ToArray());             Console.WriteLine("Completed!");             Console.Read();           }           private static void Print(object param)         {             var p = (Tuple<string, EventWaitHandle>)param;             Console.WriteLine(Thread.CurrentThread.Name + ": Begin!");             Console.WriteLine(Thread.CurrentThread.Name + ": Print" + p.Item1);             Thread.Sleep(300);             Console.WriteLine(Thread.CurrentThread.Name + ": End!");             p.Item2.Set();         }       } }

来自为知笔记(Wiz)