// 通监视器来创建临界区
        static public void DelUser(string name)
        {
            try
            {
                // 等待线程进入
                Monitor.Enter(Names);
                Names.Remove(name);
                Console.WriteLine("Del: {0}", Names.Count);
                Monitor.Pulse(Names);
            }
            finally
            {
                // 释放对象锁
                Monitor.Exit(Names);
            }
        }
    }

// 通过属性设置整个方法为临界区
        [MethodImpl(MethodImplOptions.Synchronized)]
        static public void AddUser(string name)
        {
            Names.Add(name);
            Console.WriteLine("Add: {0}",Names.Count);
        }

if (Monitor.TryEnter(Names))
            {
                Monitor.Wait(Names, 1000); // !!
                Names.Remove(name);
                Console.WriteLine("Del: {0}", Names.Count);
                Monitor.Pulse(Names);
            }

static public void ThreadFunc(object name)
        {
            string str = name as string;
            Random rand = new Random();
            int count = rand.Next(100, 200);
            for (int i = 0; i < count; i++)
            {
                lock (NumList)
                {
                    NumList.Add(i);
                    Console.WriteLine("{0} {1}", str, i);
                }
            }
        }

static private ReaderWriterLock _rwlock = new ReaderWriterLock();

static public void ReaderThread(int thrdId)
        {
            try
            { // 请求读锁，如果100ms超时退出
                _rwlock.AcquireReaderLock(10);
                try
                {
                    int inx = _rand.Next(_list.Count);
                    if (inx < _list.Count)
                        Console.WriteLine("{0}thread {1}", thrdId, _list[inx]);
                }
                finally
                {
                    _rwlock.ReleaseReaderLock();
                }
            }
            catch (ApplicationException) // 如果请求读锁失败
            {
                Console.WriteLine("{0}thread get reader lock out time!", thrdId);
            }
        }
        static public void WriterThread()
        {
            try
            {
                // 请求写锁
                _rwlock.AcquireWriterLock(100);
                try
                {
                    string val = _rand.Next(200).ToString();
                    _list.Add(val); // 写入资源
                    Console.WriteLine("writer thread has written {0}", val);
                }
                finally
                { // 释放写锁
                    _rwlock.ReleaseWriterLock();
                }
            }
            catch (ApplicationException)
            {
                Console.WriteLine("Get writer thread lock out time!");
            }
        }

static private void UpgradeAndDowngrade(int thrdId)
        {
            try
            {
                _rwlock.AcquireReaderLock(10);
                try
                {
                    try
                    {
                        // 提升读锁到写锁
                        LockCookie lc = _rwlock.UpgradeToWriterLock(100);
                        try
                        {
                            string val = _rand.Next(500).ToString();

                            _list.Add(val); Console.WriteLine
("Upgrade Thread{0} add {1}", thrdId, val);
                        }
                        finally
                        { // 下降写锁
                            _rwlock.DowngradeFromWriterLock(ref lc);
                        }
                    }
                    catch (ApplicationException)
                    {
                        Console.WriteLine("{0}thread upgrade reader lock failed!", thrdId);
                    }
                }
                finally
                {
                    // 释放原来的读锁
                    _rwlock.ReleaseReaderLock();
                }
            }
            catch (ApplicationException)
            {
                Console.WriteLine("{0}thread get reader lock out time!", thrdId);
            }
        }

static public void AddString(string str)
        {
            // 设置超时时限并在wait前退出非默认托管上下文
            if (_mtx.WaitOne(1000, true))
            {
                _resource.Add(str);
                _mtx.ReleaseMutex();
            }
        }

class SemaphoreTest
    {
        static Semaphore s = new Semaphore(3, 3); // 当前值=3; 容量=3
        static void Main()
        {
            for (int i = 0; i < 10; i++)
                new Thread(Go).Start();
        }
        static void Go()
        {
            while (true)
            {
                s.WaitOne();
                Thread.Sleep(100); // 一次只有个线程能被处理
                s.Release();
            }
        }
    } 

事件(ManualResetEvent/AutoResetEvent)   
< src="http://blog.csdn.net/count.aspx?ID=1857459&Type=Rank"
type="text/javascript">
AutoResetEvent

class BasicWaitHandle
    {
        static EventWaitHandle wh = new AutoResetEvent(false);
        static void Main()
        {
            new Thread(Waiter).Start();
            Thread.Sleep(1000); // 等待一会儿
            wh.Set(); // 唤醒
        }
        static void Waiter()
        {
            Console.WriteLine("Waiting...");
            wh.WaitOne(); // 等待唤醒
            Console.WriteLine("Notified");
        }
    }

class Test
    {
        static ManualResetEvent starter = new ManualResetEvent(false);
        public static void Main()
        {
            ThreadPool.RegisterWaitForSingleObject(starter, Go, "hello", -1, true);
            Thread.Sleep(5000);
            Console.WriteLine("Signaling worker...");
            starter.Set();
            Console.ReadLine();
        }
        public static void Go(object data, bool timedOut)
        {
            Console.WriteLine("Started " + data); // Perform task...
        }
    }

class Test
    {
        static object workerLocker = new object();
        static int runningWorkers = 100;
        public static void Main()
        {
            for (int i = 0; i < runningWorkers; i++)
            {
                ThreadPool.QueueUserWorkItem(Go, i);
            }
            Console.WriteLine("Waiting for threads to complete...");
            lock (workerLocker)
            {
                while (runningWorkers > 0)
                    Monitor.Wait(workerLocker);
            }
            Console.WriteLine("Complete!");
            Console.ReadLine();
        }
        public static void Go(object instance)
        {
            Console.WriteLine("Started: " + instance);
            Thread.Sleep(1000);
            Console.WriteLine("Ended: " + instance);
            lock (workerLocker)
            {
                runningWorkers--;
                Monitor.Pulse(workerLocker);
            }
        }
    }