C# ManualResetEvent例子

    class Program
    {

        // mre is used to block and release threads manually. It is
        // created in the unsignaled state.
        private static ManualResetEvent mre = new ManualResetEvent(false);

        static void Main()
        {
            Console.WriteLine("\nStart 3 named threads that block on a ManualResetEvent:\n");

            for (int i = 0; i <= 2; i++)
            {
                Thread t = new Thread(ThreadProc);
                t.Name = "Thread_" + i;
                t.Start();
            }

            Thread.Sleep(500);
            Console.WriteLine("\nWhen all three threads have started, press Enter to call Set()" +
                              "\nto release all the threads.\n");
            Console.ReadLine();

            mre.Set();

            Thread.Sleep(500);
            Console.WriteLine("\nWhen a ManualResetEvent is signaled, threads that call WaitOne()" +
                              "\ndo not block. Press Enter to show this.\n");
            Console.ReadLine();

            for (int i = 3; i <= 4; i++)
            {
                Thread t = new Thread(ThreadProc);
                t.Name = "Thread_" + i;
                t.Start();
            }

            Thread.Sleep(500);
            Console.WriteLine("\nPress Enter to call Reset(), so that threads once again block" +
                              "\nwhen they call WaitOne().\n");
            Console.ReadLine();

            mre.Reset();

            // Start a thread that waits on the ManualResetEvent.
            Thread t5 = new Thread(ThreadProc);
            t5.Name = "Thread_5";
            t5.Start();

            Thread.Sleep(500);
            Console.WriteLine("\nPress Enter to call Set() and conclude the demo.");
            Console.ReadLine();

            mre.Set();

            // If you run this example in Visual Studio, uncomment the following line:
            Console.ReadLine();
        }

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

            Console.WriteLine(name + " starts and calls mre.WaitOne()");

            mre.WaitOne();

            Console.WriteLine(name + " ends.");
        }

    }