public ActionResult CreateComment()
        {
            Commentdb commentdb = new Commentdb()
            {
            };

            return(View(commentdb));
        }
        public ActionResult CreateComment(Commentdb model)
        {
            if (ModelState.IsValid)
            {
                model.Created = DateTime.Now;
                //
                int Studentid;
                int.TryParse(Session["StudentId"].ToString(), out Studentid);
                model.StudentId = Studentid;
                //
                int PostId;
                int.TryParse(Session["PostId"].ToString(), out PostId);
                model.PostId = PostId;
                //
                model.Created = DateTime.Now;
                //
                repositoryComment.Create(model);
                repositoryComment.Save();

                return(RedirectToAction("Details", new { id = model.PostId }));
            }
            return(View(model));
        }