public ActionResult Delete(int?id, [FetchComment(KeyName = "id")] CommentEntity entity)
        {
            if (id == null || entity == null)
            {
                ModelState.AddModelError("", "参数验证失败.");
                return(View());
            }

            var vo = MappingManager.CommentViewMapping(entity);

            return(View(vo));
        }