删除DataTable的指定行(Lambda)

 DataTable dtTcu = GetAllTcuInfoBySdId(sdId);
             DataTable dtToesm = GetAllToesmBySdId(sdId);

             foreach (DataRow row in dtToesm.Rows)
             {
                 int toesmTcuId = ConvertHelper.ToInt32(row["toesm_manager_tcu_id"]);   //店主
                 int shopOaId = ConvertHelper.ToInt32(row["toesm_toes_oa_id"]);

                 var rows = dtTcu.AsEnumerable().Where<DataRow>(c => c.RowState != DataRowState.Deleted && c["tc_cu_shop_oa_id"].ToString() == shopOaId.ToString());
                 int rowsCount = rows.Count<DataRow>();
                 if (rows != null)
                 {
                     foreach (DataRow row2 in rows)
                     {
                         int tcuId = ConvertHelper.ToInt32(row2["tc_cuid"]);
                         if (tcuId != toesmTcuId)
                         {
                             dtTcu.Rows[dtTcu.Rows.IndexOf(row2)].Delete();
                         }
                     }
                 }
             }

             dtTcu.AcceptChanges();
             return dtTcu;

c.RowState != DataRowState.Deleted       //不读取已标记未删除的行(必须判断,否则会抛出异常"读取已删除的行........")

dtTcu.AcceptChanges();   //提交