http://www.codeproject.com/Articles/630277/Generic-Data-Access-Layer-GDA-Part-I
http://www.codeproject.com/Articles/681565/Self-Synchronized-Data-Access-Layer?msg=5004433#xx5004433xx
Generic Data Access Layer泛型的数据访问层
原文：http://www.cnblogs.com/chucklu/p/4482346.html