private void MainDataGrid_OnCellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
        {
            switch (TabControl.SelectedIndex)
            {
            case 0:
                _devRepo.DevUpdate(e.Row.Item as DEVELOPER);
                break;

            case 1:
                _gameRepo.GameUpdate(e.Row.Item as GAME);
                break;

            case 2:
                _manRepo.ManUpdate(e.Row.Item as MANAGER);
                break;

            case 3:
                _artRepo.ArtUpdate(e.Row.Item as ARTIST);
                break;
            }
        }