请问group by a,b linq to sql 怎么写呀?
请问group by a,b linq to sql 怎么写呀?

[解决办法]
LINQ to SQL语句之Group By/Having
[解决办法]
List <A> List = new List <A>();
var P= List
.GroupBy(x => new { x.Age, x.Sex })
.Select(group => new {
Stu= group.Key, Count = group.Count()
});
foreach (var a in P) {

}
LS连接很全面
[解决办法]
http://kb.cnblogs.com/zt/linq/
[解决办法]