http://www.360doc.com/content/13/0712/09/10504424_299336674.shtml
Linq处理List数据
http://blog.163.com/lm_regina/blog/static/17419653620110287530239/
http://www.cnblogs.com/ForEvErNoME/archive/2012/07/25/2606659.html
原文：http://www.cnblogs.com/chengjun/p/5466663.html