// PUT api/Metadata/5
        public HttpResponseMessage PutMetadataProperty(int id, MetadataProperty metadataproperty)
        {
            var db = ServicesContext.Current;
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != metadataproperty.Id)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }

            db.Entry(metadataproperty).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }
        // POST api/Metadata
        public HttpResponseMessage PostMetadataProperty(MetadataProperty metadataproperty)
        {
            var db = ServicesContext.Current;
            if (ModelState.IsValid)
            {
                db.MetadataProperty.Add(metadataproperty);
                db.SaveChanges();

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, metadataproperty);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = metadataproperty.Id }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }