private void MainDataGrid_OnRowEditEnding(object sender, DataGridRowEditEndingEventArgs e)
        {
            try
            {
                switch (TabControl.SelectedIndex)
                {
                case 0:
                    var dev = e.Row.Item as DEVELOPER;
                    if (dev.DVLP_ID == 0)
                    {
                        _devRepo.Add(dev);
                    }
                    break;

                case 1:
                    var game = e.Row.Item as GAME;
                    if (game.ID_GAMES == 0)
                    {
                        _gameRepo.Add(game);
                    }
                    break;

                case 2:
                    var man = e.Row.Item as MANAGER;
                    if (man.MANAGER_ID == 0)
                    {
                        _manRepo.Add(man);
                    }
                    break;

                case 3:
                    var art = e.Row.Item as ARTIST;
                    if (art.ARTST_ID == 0)
                    {
                        _artRepo.Add(art);
                    }
                    break;
                }
                Update();
            }
            catch { }
        }