091118 T 转两篇线程控制的文章
http://www.itstrike.cn/Home/Article/.NET4-System.Threading.Barrier-Class-Description
http://www.itstrike.cn/Home/Article/.NET4-System.Threading.CountdownEvent-Introduction
http://www.itstrike.cn/Home/Article/.NET4-System.Threading.Barrier-Class-Description
http://www.itstrike.cn/Home/Article/.NET4-System.Threading.CountdownEvent-Introduction
