public ActionResult Edit(int?id, string returnUrl)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            Article article = Data.Articles.GetById((int)id);

            if (article == null)
            {
                return(HttpNotFound());
            }
            ArticlesEditViewModel articleModel = ArticlesEditViewModel.TransformToViewModel(article);

            return(View(articleModel));
        }