public HttpResponseMessage Put(HttpRequestMessage request, SlideViewModel slideVm) { return(CreateHttpResponse(request, () => { HttpResponseMessage response = null; if (!ModelState.IsValid) { request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState); } else { var slideDb = _slideService.GetByID(slideVm.ID); slideDb.UpdateSlide(slideVm); _slideService.Update(slideDb); _slideService.SaveChanges(); response = request.CreateResponse(HttpStatusCode.OK); } return response; })); }