public static bool ChooseSeries(string currentSeries, out string newSeries)
        {
            newSeries = "";
            instance  = new FormSeries(currentSeries);
            var result = instance.ShowDialogUpdated();

            newSeries = instance.Series;
            return(result);
        }
        private void changeSeriesToolStripMenuItem_Click(object sender, EventArgs e)
        {
            try
            {
                string selected = "";

                List <Rom> romList = new List <Rom>();

                foreach (DataGridViewRow row in dataGridView.SelectedRows)
                {
                    romList.Add((Rom)row.Tag);
                }

                if (romList.Count == 1)
                {
                    selected = romList[0].Series;
                }
                else if (romList.Count > 1)
                {
                    selected = romList[0].Series;

                    foreach (var rom in romList)
                    {
                        if (rom.Series != selected)
                        {
                            selected = "";
                            break;
                        }
                    }
                }

                if (!FormSeries.ChooseSeries(selected, out selected))
                {
                    return;
                }

                foreach (var rom in romList)
                {
                    rom.Series = selected;
                }

                RomBusiness.SetRom(romList);

                foreach (DataGridViewRow row in dataGridView.SelectedRows)
                {
                    Rom rom = (Rom)row.Tag;
                    row.Cells[columnSeries.Index].Value = rom.Series;
                }

                dataGridView.Refresh();
            }
            catch (Exception ex)
            {
                FormCustomMessage.ShowError(ex.Message);
            }
        }