Entity Framework 4.1 之五：多对多的关系
原文名称：Entity Framework 4.1: Many to Many Relationships (5)
原文地址：http://vincentlauzon.wordpress.com/2011/04/15/entity-framework-4-1-many-to-many-relationships-5/
看到 Entity Framework 4.1 推荐英文教程，为了帮大
http://cyqdata.cn/cnblogs/article-detail-37094