ManualResetEvent & AutoResetEvent

 　　参考资料：

　　1. https://msdn.microsoft.com/en-us/library/system.threading.manualresetevent.aspx

　　2. https://msdn.microsoft.com/en-us/library/system.threading.autoresetevent.aspx

　　二者的区别，跑一下下边的程序就懂了。

 　　ManualResetEvent：通知一个或多个等待线程该事件已经发生。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Test01
{
    class Program
    {
        private static ManualResetEvent mre = new ManualResetEvent(false);

        static void Main(string[] args)
        {
            for (int i = 0; i < 3; i++)
            {
                Thread thread = new Thread(ThreadProc);
                thread.Name = "Thread_" + i;
                thread.Start();
            }

            Thread.Sleep(100);
            Console.WriteLine("If you want to release all threads. Please press 'Enter'.");
            Console.ReadLine();

            mre.Set();
            Console.WriteLine("All threads have been released.");
            mre.Reset();
        }

        private static void ThreadProc()
        {
            string threadName = Thread.CurrentThread.Name;

            Console.WriteLine("Thread: " + threadName + " starts and begin WaitOne().");
            mre.WaitOne();
            Console.WriteLine("Thread: " + threadName + " gets the signal and ends.");
        }
    }
}

 　　AutoResetEvent：通知一个等待线程该事件已经发生。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Test02
{
    class Program
    {
        private static AutoResetEvent are = new AutoResetEvent(false);

        static void Main(string[] args)
        {
            for (int i = 0; i < 3; i++)
            {
                Thread thread = new Thread(ThreadProc);
                thread.Name = "Thread_" + i;
                thread.Start();
            }

            Thread.Sleep(100);

            Console.WriteLine("Please press Enter to release the signal.");
            Console.ReadLine();
            are.Set();
        }

        private static void ThreadProc()
        {
            string threadName = Thread.CurrentThread.Name;

            Console.WriteLine("Thread: " + threadName + " waits for AutoResetEvent.");
            are.WaitOne();
            Console.WriteLine("Thread: " + threadName + " gets the signal and is released.");
            are.Set();
        }
    }
}