public void AddNewList(string userName, string newListName)
 {
     int userListId = userLists.Max(x => x.UserListId) + 1;
     UserList userList = new UserList
                             {
                                 Owner = userName,
                                 Title = newListName,
                                 UserListId = userListId
                             };
     userLists.Add(userList);
 }
 partial void _onUserListChanging(UserList value);