public HttpResponseMessage UpdateQuestion(int id, Question question) { if (!ModelState.IsValid) { return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState)); } if (id != question.QuestionId) { return(Request.CreateResponse(HttpStatusCode.BadRequest)); } QuestionRepository.Attach(question); try { unitOfWork.SaveChanges(); } catch (DbUpdateConcurrencyException ex) { return(Request.CreateErrorResponse(HttpStatusCode.NotFound, ex)); } return(Request.CreateResponse(HttpStatusCode.OK)); }