C# 将T-SQL语句转换为LINQ表达式

我对linq非常陌生，实际上正在努力将以下t-sql语句转换为linq to sql或linq to entities表达式：

SELECT TOP 1
    vm.EventID,
    vmm.VotingMatrixID,
    PersonAcceptedCount = SUM( CAST( vmm.IsAccepted AS INT) )

FROM    VotingMatrixMember vmm

JOIN    VotingMatrix vm
    ON vmm.VotingMatrixID = vm.ID

WHERE vm.EventID = 'abbe3077-24de-45d8-ac04-13dba97c1567'
    AND vm.Deleted = 0
    AND vmm.Deleted = 0

GROUP BY vm.EventID, vmm.VotingMatrixID

ORDER BY PersonAcceptedCount DESC

试试这个，不能测试

        var firstItem = (
                        from vmm in db.VotingMatrixMember
                        join vm in db.VotingMatrix on vmm.VotingMatrixID equals vm.ID
                        where vm.EventID =  "abbe3077-24de-45d8-ac04-13dba97c1567"
                                                && vm.Deleted = 0
                                                && vmm.Deleted = 0
                        group new {vm, vmm} by new {vm.EventID, vmm.VotingMatrixID} into gr
                        select new
                        {
                            EventID = gr.Key.EventID,
                            VotingMatrixID = gr.Key.VotingMatrixID,
                            PersonAcceptedCount = gr.Sum(x => Convert.ToInt32(x.IsAccepted))
                        } 
                        into groupedItem 
                        orderby  groupedItem.PersonAcceptedCount descending 
                        select groupedItem                            
                         ).FirstOrDefault();

---

@大卫B：只要稍加修改，我就可以了。谢谢你们两位！

        var firstItem = (
                        from vmm in db.VotingMatrixMember
                        join vm in db.VotingMatrix on vmm.VotingMatrixID equals vm.ID
                        where vm.EventID =  "abbe3077-24de-45d8-ac04-13dba97c1567"
                                                && vm.Deleted = 0
                                                && vmm.Deleted = 0
                        group new {vm, vmm} by new {vm.EventID, vmm.VotingMatrixID} into gr
                        select new
                        {
                            EventID = gr.Key.EventID,
                            VotingMatrixID = gr.Key.VotingMatrixID,
                            PersonAcceptedCount = gr.Sum(x => Convert.ToInt32(x.IsAccepted))
                        } 
                        into groupedItem 
                        orderby  groupedItem.PersonAcceptedCount descending 
                        select groupedItem                            
                         ).FirstOrDefault();