class Program    {              static void Main(string[] args)        {            var t = new Thread(()=>Process(10));            t.Start();            Console.WriteLine("老师等待提交试卷");            _StudentEvent.WaitOne();            Console.WriteLine("老师正在批阅英语试卷");            Thread.Sleep(TimeSpan.FromSeconds(5));            Console.WriteLine("老师批阅完成，打100分");            _TeacherEvent.Set();            Console.ReadKey();        }        static AutoResetEvent _StudentEvent = new AutoResetEvent(false);        static AutoResetEvent _TeacherEvent = new AutoResetEvent(false);        static void Process(int seconds)        {            Console.WriteLine("学生开始考英语");            Thread.Sleep(TimeSpan.FromSeconds(seconds));            Console.WriteLine("学生交卷");            _StudentEvent.Set();            Console.WriteLine("等待老师批阅");            _TeacherEvent.WaitOne();            Console.WriteLine("学生领到试卷");        }           }