求一条Sql翻译成Linq To Entity的写法

SELECT 

CONVERT(varchar(6), ActualSendTime,112),

COUNT(1),

SUM(a.ReceivablePrice),



COUNT(distinct customerid)



FROM Delivery a

WHERE OrderStatusID=5

group by  CONVERT(varchar(6), ActualSendTime,112) 

COUNT(distinct customerid) 这句该怎么翻译成Linq to entity?
------解决方案--------------------

var query=from a in Delivery.ToList()

          where a.OrderStatusID==5

          group a by a.ActualSendTime.ToString("yymmdd") into g

          select new 

          { 

            Time=g.Key,

            Count=g.Count(),

            price=g.Sum(x=>x.ReceivablePrice),

            cid=g.Select(x=>x.customerid).Distinct().Count()

          }