// PUT: api/User/5 public HttpResponseMessage Put(int id, [FromBody] User User) { UserPersistence uP = new UserPersistence(); bool recordExisted = false; recordExisted = uP.ChangeUser(id, User); HttpResponseMessage response; if (recordExisted) { response = Request.CreateResponse(HttpStatusCode.NoContent); } else { response = Request.CreateResponse(HttpStatusCode.NotFound); } return(response); }