public void InsertCauTraLoi(string taikhoan, string CauHoiID, string noidung)
 {
     hoctuvungLINQDataContext db = new hoctuvungLINQDataContext();
     TraLoi_DienDan tldd = new TraLoi_DienDan();
     tldd.TraLoiID = Guid.NewGuid();
     Guid myguid = new Guid(CauHoiID);
     tldd.CauHoiID = myguid;
     tldd.taikhoan = taikhoan;
     tldd.Noidung = noidung;
     tldd.NgayGoi = DateTime.Now;
     db.TraLoi_DienDans.InsertOnSubmit(tldd);
     db.SubmitChanges();
 }
		private void detach_TraLoi_DienDans(TraLoi_DienDan entity)
		{
			this.SendPropertyChanging();
			entity.CauHoi_DienDan = null;
		}
 partial void DeleteTraLoi_DienDan(TraLoi_DienDan instance);
 partial void UpdateTraLoi_DienDan(TraLoi_DienDan instance);
 partial void InsertTraLoi_DienDan(TraLoi_DienDan instance);
		private void attach_TraLoi_DienDans(TraLoi_DienDan entity)
		{
			this.SendPropertyChanging();
			entity.NguoiDung = this;
		}