public ActionResult Create([Bind(Include = "Id,Title,Content,UserId,UserName")] Comment comment)
 {
     comment.UserId   = User.Identity.GetUserId();
     comment.UserName = User.Identity.GetUserName();
     ModelState.Clear();
     TryValidateModel(comment);
     if (ModelState.IsValid)
     {
         string EncodedResponse = Request.Form["g-recaptcha-response"];
         bool   isCaptchaValid  = (ReCaptchaClass.Validate(EncodedResponse) == "true" ? true : false);
         if (isCaptchaValid)
         {
             db.Comments.Add(comment);
             db.SaveChanges();
             return(RedirectToAction("Index"));
         }
         else
         {
             TempData["recaptcha"] = "Please verify you are not a robot";
         }
     }
     return(View(comment));
 }