c# - Linq to Lambda 表达式 c#

Question

var ListInOrder = (from f in finaldatelist
               group f by new { f.RoomID, f.RateGroupID } into g
               select g);

into g 和 select g 部分的 lambda 表达式是什么？

这是我现在得到的:

 var ListInOrder = finaldatelist.GroupBy(x => x.RoomID, x => x.RateGroupID).Select();

Answer 1

finaldatelist.GroupBy(x => new { x.RoomID, x.RateGroupID });