public Response logout(string userId) { Response retval = new LogoutResponseError("Can't logout now!"); try { var userRow = _dal.Logout(userId).Tables[0].Rows; if (userRow[0].Field <Decimal>("ISLOGIN") == 0) { retval = new LogoutResponseOk("You are Logout!"); } } catch (Exception ex) { retval = new AppResponseError(ex.Message); } return(retval); }