Monitor用法

public class MonitorDemo
    {
        public void ShowMsg(object obj) {
            Monitor.Enter(typeof(MonitorDemo));
            Console.WriteLine(string.Format("显示信息：{0},并停留5秒,当前时间：",obj.ToString(),DateTime.Now));
            Thread.Sleep(5000);
            Monitor.Exit(typeof(MonitorDemo));
        }
    }


 Thread thread = null;
            MonitorDemo monitor=new MonitorDemo();
            for (int i = 0; i < 3; i++)
            {
                thread = new Thread(new ParameterizedThreadStart(monitor.ShowMsg));
                thread.Start(i);
            }