class Program
    {
        static void Main(string[] args)
        {
            Thread t = new Thread(LockObject.MonitorIncrement);
            Thread t1=new Thread(new ThreadStart(LockObject.LockIncrement));
            t.Start();           
            t1.Start();          
        }
    }


    public class LockObject
    {
        /// <summary>
        /// 多线程共享数据
        /// </summary>
         private static int counter = 0;
        /// <summary>
        /// 同步对象,推荐这种写法
        /// 应避免锁定 public 类型，否则实例将超出代码的控制范围
        /// 具体如：lock (this)、lock (typeof (MyType)) 和 lock ("myLock")
        /// </summary>
         private readonly static object synisynchronize = new object();

        public static void MonitorIncrement()
        {
            ///Monitor.Enter 与 Monitor.Exit 相当于Lock            
            Monitor.Enter(synisynchronize);
            Thread.Sleep(1000);
            counter++;
            Console.WriteLine("MonitorIncrement counter={0}", counter);
            Monitor.Exit(synisynchronize);
        }

        public static void LockIncrement()
        {
            ///lock在开始时调用 Monitor.Enter 
            ///在结束时调用 Monitor.Exit 。
            lock (synisynchronize)
            {             
                counter++;
                Console.WriteLine("LockIncrement counter={0}" ,counter);
            }
        }
    }