Linq to Entities简单组查询

var query = answers   .GroupBy(a => a.answernumber, a => a, (k, g) => new {answernumber = k, Count = g.Count()})   .OrderyBy(i => i.answernumber);

或另一种方式：

var query2 = from a in answers         group a by a. answernumber into g         orderby g.Key         select new { answernumber = g.Key, Count = g.Count() };