1…NET中那些所谓的新语法之四:标准查询运算符与LINQ http://www.cnblogs.com/edisonchou/p/4109465.html 2.LINQ to SQL语句 http://www.cnblogs.com/jara/p/3473996.html 3.linq中group by https://www.cnblogs.com/qixu/p/6033532.html