public void AddUser(UserModel user)
        {
            var data = GetAll();

            var states = CommonFunctions.GetStates();
            GeneralModel p = states.FirstOrDefault(a => a.KeyId == user.StateID);

            if (p != null)
                user.State = p.Description;

            if (user.ID == 0)
            {
                if (data.Count > 0)
                    user.ID = data.Max(a => a.ID) + 1;
                else
                    user.ID = 100000;
            }

            data.Add(user);
            HttpContext.Current.Session[SessionUserList] = data;
        }
 public void Update(UserModel user)
 {
     DelUser(user.ID);
     AddUser(user);
 }