public ActionResult DeleteExtra(int id)
        {
            ExtraTerms terms = db.ExtraTerms.Find(id);

            db.ExtraTerms.Remove(terms);
            db.SaveChanges();
            return(RedirectToAction("Details", new { id = terms.TermsId }));
        }
 public ActionResult CreateExtra(int?id, [Bind(Include = "Id,Value")] ExtraTerms extraTerm)
 {
     if (ModelState.IsValid)
     {
         extraTerm.TermsId = (int)id;
         db.ExtraTerms.Add(extraTerm);
         db.SaveChanges();
         return(RedirectToAction("Details", new { id = id }));
     }
     return(View());
 }