RadioDld.ChooseCols.ButtonOk_Click C# (CSharp) Method

        private void ButtonOk_Click(object sender, EventArgs e)
        {
            this.columnOrder.Clear();

            foreach (ListViewItem item in this.ListColumns.Items)
            {
                if (item.Checked)
                {
                    this.columnOrder.Add(int.Parse(item.Name, CultureInfo.InvariantCulture));
                }
            }
        }