public ActionResult DeleteLink(string Id, int ItemId)
        {
            DataRepository helper = new DataRepository();

            helper.DeleteLink(Convert.ToInt32(Id));

            IList<Link> links = helper.getLinks(ItemId);

            DiscussionViewModel model = new DiscussionViewModel(-1, null, links, "", "", null, "", "", "", "");

            ViewData["Id"] = Id;

            return PartialView(model);
        }