public ActionResult ViewLegacyAttachment(int?postId)
        {
            if (postId == null)
            {
                return(HttpNotFound());
            }

            var article = ArticleModel.GetArticleByLegacyPost((int)postId);

            if (article == null)
            {
                return(RedirectPermanent(string.Format("https://{0}/forums/{1}/PostAttachment.aspx", Config.NodeBB.Host, postId)));
            }

            return(RedirectToActionPermanent("ViewArticle", new { articleSlug = article.Slug }));
        }
        public ActionResult ViewLegacyPost(int?postId)
        {
            if (postId == null)
            {
                return(HttpNotFound());
            }

            var article = ArticleModel.GetArticleByLegacyPost((int)postId);

            if (article == null)
            {
                return(HttpNotFound());
            }

            return(RedirectToActionPermanent("ViewArticle", new { articleSlug = article.Slug }));
        }