static void Main(string[] args)
        {   
            Thread t1 = new Thread(new ThreadStart(threadfunction));
            Thread t2 = new Thread(new ThreadStart(fun));
             t1.Priority = ThreadPriority.Highest;//为什么结果是：线程2 线程1？t1的优先级不是比t2高吗？
            t2.Start();
            t1.Start();
           

        }

        public static  void threadfunction()
        {
            Console.WriteLine("线程1");
        }
        public static void fun()
        {
            Console.WriteLine("线程2");
        }