C # Multi-threaded waiting for all threads to end an issue

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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();        }    }}

Once set, actually using ManualResetEvent is enough.

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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();        }    }}

From for notes (Wiz)

C # Multi-threaded waiting for all threads to end an issue