如何编写（简单的）LINQ to Entities查询以按属性将元素分组并对其进行计数？
SELECT answernumber, count(answerID) FROM answers WHERE questionID = id GROUB BY answernumber ORDERBY answernumber;
那应该很简单，但是我不知道怎么写。
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() };
