Linq分组和投影查询

我有一个EF“Call”类，它有日期、电话号码、呼叫者姓名和通话费用

我的目标是按电话号码对通话进行分组，计算总成本，并得出40个最昂贵通话的结果。我有所有这些工作，但我有问题的投影，我如何获得访问呼叫者的名字

var query =
(

from call in model.Calls
group call by call.TelephoneNumber into g
orderby g.Sum(gr => gr.ActualCost) descending

select new

{
TelephoneNumber = g.Key,
CallerName = ???
Cost = (g.Sum(gr => gr.ActualCost)),
TotalNumbers = g.Count(),
}

).Take(40);

---

您还需要CallerName上的组：

var query =
  (from call in model.Calls
  group call by new { call.TelephoneNumber, call.CallerName }  into g
  orderby g.Sum(gr => gr.ActualCost) descending
  select new
  {
    TelephoneNumber = g.Key.TelephoneNumber,
    CallerName = g.Key.CallerName,
    Cost = (g.Sum(gr => gr.ActualCost)),
    TotalNumbers = g.Count(),
  }).Take(40);

---

非常感谢你的帮助！太简单了！