Linq 多字段分组

//多字段分组

var query = (from a in db.as

group a by new { a.F1, a.F2} into ga

select new { key0 = ga.Key, key1 = ga.Key.F1, key2 = ga.Key.F2, Names = ga.Max(a=> a.F3) });

foreach (var item in query)

{

    Response.Write("key0:" + item.key0 + "key1:" + item.key1 + "key2:" + item.key2 + ":" + item.Names.ToString() + Environment.NewLine);

}