class Program

    {

        private static ReaderWriterLockSlim _LockSlim = new ReaderWriterLockSlim();

        private static Hashtable list = Hashtable.Synchronized(new Hashtable());

        static void Main(string[] args)

        {

            new Thread(new ParameterizedThreadStart(delegate(object obj) {

                Write(, );

            })).Start();

            Thread.Sleep();

            new Thread(new ParameterizedThreadStart(delegate(object obj)

            {

                Read(, );

            })).Start();

            new Thread(new ParameterizedThreadStart(delegate(object obj)

            {

                Read(, );

            })).Start();

            new Thread(new ParameterizedThreadStart(delegate(object obj)

            {

                Read(, );

            })).Start();

            new Thread(new ParameterizedThreadStart(delegate(object obj)

            {

                Read(, );

            })).Start();

            Console.ReadKey();

        }

        /// <summary>

        /// 对于i相同的线程进行阻塞保证不会并行多个

        /// </summary>

        /// <param name="i"></param>

        /// <param name="j"></param>

        public static void Read(int i,int j)

        {

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "即将进入读取状态");

            _LockSlim.EnterReadLock();

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "进入读取状态");

            Thread.Sleep(j);

            _LockSlim.ExitReadLock();

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "退出读取状态");

        }

        public static void Write(int i, int j)

        {

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "即将进入写入状态");

            _LockSlim.EnterWriteLock();

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "进入写入状态");

            Thread.Sleep(j);

            _LockSlim.ExitWriteLock();

            Console.WriteLine(DateTime.Now.ToString() + "\t线程" + i.ToString() + "退出写入状态");

        }

    }

// ::      线程0即将进入写入状态

// ::      线程0进入写入状态

// ::      线程1即将进入读取状态

// ::      线程2即将进入读取状态

// ::      线程3即将进入读取状态

// ::      线程4即将进入读取状态

// ::      线程1进入读取状态

// ::      线程4进入读取状态

// ::      线程0退出写入状态

// ::      线程2进入读取状态

// ::      线程3进入读取状态

// ::      线程2退出读取状态

// ::      线程1退出读取状态

// ::      线程4退出读取状态

// ::      线程3退出读取状态