public HttpResponseMessage Put(HttpRequestMessage request, ProductTagViewModel productTagVm) { return(CreateHttpResponse(request, () => { HttpResponseMessage response = null; if (!ModelState.IsValid) { request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState); } else { var productTagDb = _productTagService.GetByID(productTagVm.ProductID, productTagVm.TagID); productTagDb.UpdateProductTag(productTagVm); _productTagService.Update(productTagDb); _productTagService.SaveChanges(); response = request.CreateResponse(HttpStatusCode.OK); } return response; })); }