public ActionResult Edit(Gab gab)
 {
     if (ModelState.IsValid)
     {
         db.Entry(gab).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(gab);
 }
 public ActionResult Create(object sender, EventArgs e)
 {
         Gab gab = new Gab();
         string content = Request.Form["content"];               
         gab.Date = DateTime.Now;
         gab.UserID = Convert.ToInt32(Session["ID"]);
         gab.User = db.User.Find(gab.UserID);
         gab.content = content;
         db.Gab.Add(gab);
         db.SaveChanges();
         return RedirectToAction("MainPage");
 }