// Create
        public HttpResponseMessage Post(Subject subject)
        {
            Uow.Subjects.Add(subject);
            Uow.Commit();

            var response = Request.CreateResponse(HttpStatusCode.Created, subject);

            response.Headers.Location = new Uri(Url.Link(WebApiConfig.ControllerAndId, new { id = subject.Id }));

            return response;
        }
 // Update
 public HttpResponseMessage Put(Subject subject)
 {
     Uow.Subjects.Update(subject);
     Uow.Commit();
     return new HttpResponseMessage(HttpStatusCode.NoContent);
 }