《C#多线程编程实战》2.6 ManualResetEventSlim

 class Program
    {
        static void Test(string threadName,int seconds)
        {
            Console.WriteLine($"{threadName} falls to sleep");
            Thread.Sleep(TimeSpan.FromSeconds(seconds));
            Console.WriteLine($"{threadName} waits for the gates to open");
            _mainEvent.Wait();
           
            Console.WriteLine($"{threadName} enters the gats");
        }
        static ManualResetEventSlim _mainEvent = new ManualResetEventSlim(false);
        static void Main(string[] args)
        {
            var t1 = new Thread(() => Test("Thread 1", 5));
            var t2 = new Thread(() => Test("Thread 2", 6));
            var t3 = new Thread(() => Test("Thread 3", 12));
            t1.Start();
            t2.Start();
            t3.Start();
            Thread.Sleep(TimeSpan.FromSeconds(6));
            Console.WriteLine("the gates are now open");
            _mainEvent.Set();
            Thread.Sleep(TimeSpan.FromSeconds(2));
            _mainEvent.Reset();
            
            Console.WriteLine("the gates have been closed!");
            Thread.Sleep(TimeSpan.FromSeconds(10));
            Console.WriteLine("the fatres are now ioen for the second time !");
            _mainEvent.Set();
            Thread.Sleep(TimeSpan.FromSeconds(2));
            Console.WriteLine("the gates have been closed");
            _mainEvent.Reset();
            Console.ReadKey();

        }
    }