public HttpResponseMessage Post(WebBFKSRegistration registration)
        {
            if (!ModelState.IsValid || registration == null)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest, ModelState);
            }

            try
            {
                int id = repo.addBFKSRegistration(registration);
                return Request.CreateResponse(HttpStatusCode.Created, id);
            }
            catch (Exception e)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest, e);
            }
        }
        public HttpResponseMessage Put(int id, WebBFKSRegistration registration)
        {
            if (!ModelState.IsValid || registration == null || id != registration.id)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest, ModelState);
            }

            try
            {
                repo.updateBFKSRegistration(registration);
                return Request.CreateResponse(HttpStatusCode.OK);
            }
            catch (Exception e)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest, e);
            }
        }