public List<CreateBookSystem> setBookReturnDataBase(CreateBookSystem bookSystemData) { AdministrationDataBase aDB = new AdministrationDataBase(); aDB.libraryFunction(); List<CreateBookSystem> returnValue = new List<CreateBookSystem>(); if (int.Parse(aDB._StaffhaveRoles[3]) == 1) { returnValue=aDB.setBookReturnDataBase(bookSystemData); } else { CreateBookSystem addVlaue = new CreateBookSystem(); addVlaue.checkNo = _noRole; addVlaue.errorMsg = _errorMsg; returnValue.Add(addVlaue); } return returnValue; }