public ActionResult Show(int postId)
        {
            var model = new PostManageModel();

            model.ShowPost(postId);

            return(RedirectToAction("ManagePosts"));
        }
        public ActionResult RemoveMarkDuplicate(int postId)
        {
            var model = new PostManageModel();

            model.RemoveMarkDuplicate(postId);

            return(RedirectToAction("ManagePosts"));
        }