为什么我的DataContext没有Add方法！
书上的源码：

C# code

using System;using System.Linq;namespace RoomReveration{    public class RoomReservationData    {        public void ReserveRoom(RoomReservation roomReservation ) {            using (RoomReservationDataContext data = new RoomReservationDataContext()) {                data.RoomReservation.Add(roomReservation );                data.SubmitChanges();            }        }    }}

而我照着书写的，却点不出那个data.RoomReservation的Add方法，这是为什么？

[解决办法]
用InsertOnSubmit
[解决办法]
Add()是要自已写的
Table<(Of <(TEntity>)>).InsertOnSubmit