public ActionResult Comment(CommentModel model)
        {
            Comment comment = new Comment()
            {
                AuthorId = User.Identity.GetUserId(),
                LaptopId = model.LaptopId,
                Content = model.Content
            };

            this.Db.CommentsRepository.Add(comment);
            this.Db.SaveChanges();

            var commentViewModel = new CommentViewModel()
            {
                Author = User.Identity.Name,
                Content = comment.Content
            };

            return PartialView("_CommentPartial", commentViewModel);
        }
        public ActionResult Create(CommentModel model)
        {

            return null;
        }