public ActionResult Add(ArticleType articleType)
        {
            if (ModelState.IsValid)
            {
                var errors = _articleTypeService.ValidateArticleType(articleType);
                if (!errors.Any())
                {
                    _articleTypeService.Add(articleType);

                    return(RedirectToAction("Manage"));
                }
                ModelState.Merge(errors);
            }
            return(View(articleType));
        }