public HttpResponseMessage Create(OrganizerCreateModel model) { if (model == null) { ModelState.AddModelError("", "You did not send any data!"); } if (!ModelState.IsValid) { return(Request.CreateErrorResponse( HttpStatusCode.BadRequest, ModelState )); } IOrganizerService organizerService = new OrganizerService(); int id = organizerService.Create(model); return(Request.CreateResponse(HttpStatusCode.Created, id)); }