public ActionResult AddOrEdit(Admin adminModel) { using (GymAppDBEntities dbc = new GymAppDBEntities()) { if (dbc.Admins.Any(x => x.Username == adminModel.Username)) { ViewBag.DuplicateMessage = $"User {adminModel.Username} already exists."; return(View("AddOrEdit", adminModel)); } dbc.Admins.Add(adminModel); dbc.SaveChanges(); } ModelState.Clear(); ViewBag.SuccessMessage = $"Registration of {adminModel.Username} Successful."; return(View("AddOrEdit", new Admin())); }