C#中使用lock和using语法

在反编译photon源代码的时候发现的，感到很有趣，以下是反编译并补充完整的代码。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;

namespace ExitGames.Threading
{
    [StructLayout(LayoutKind.Sequential)]
    public struct Lock : IDisposable
    {
        private readonly object lockObject;
        private Lock(object obj)
        {
            this.lockObject = obj;
            Monitor.TryEnter(obj);
        }

        private Lock(object obj, int timeout)
        {
            this.lockObject = obj;
            if (!Monitor.TryEnter(obj, timeout))
            {
                throw new LockTimeoutException();
            }
        }

        public static IDisposable Enter(object syncObject)
        {
            return new Lock(syncObject);
        }

        public static IDisposable TryEnter(object syncObject, int millisecondsTimeout)
        {
            return new Lock(syncObject, millisecondsTimeout);
        }

        public void Dispose()
        {
            Monitor.Exit(this.lockObject);
        }
    }

}
           

然后，去谷歌找啊找,找到这两篇文章。2004年的老外写的，呜呼一下，现在才发现，幸好幸好。标题不知怎样写才好。

http://www.interact-sw.co.uk/iangblog/2004/03/23/locking

http://blogs.msdn.com/b/ericgu/archive/2004/03/24/95743.aspx