将SQL查询转换为LINQ ORDER BY，GROUP BY，COUNT

Question

我很难将此查询转换为LINQ。你们能帮我吗？

render()

谢谢！

Answer 1

var query = from qNo in QuestionNumber
            join tAnswer in TestAnswer on
            qNo.QNID equals tAnswer.QNID into qAnswer
            group qAnswer by qNo.ChoiceId
            where qNo.QuestionId == 30
            select new { ChoiceId = qNo.ChoiceId, 
                         QCount = qAnswer.Count() }
            orderby qAsnwer.QCount descending