private void SaveLstToTxt(ListBox lst)
{
    sfd.Filter = "(*.txt)|*.txt";
    if (sfd.ShowDialog() == DialogResult.OK)
    {
        string sPath = sfd.FileName;
        FileStream fs = new FileStream(sPath, FileMode.Create);
        StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);
        int iCount = lst.Items.Count - 1;
        for (int i = 0; i <= iCount; i++)
        {
            sw.WriteLine(lst.Items[i].ToString());
        }
        sw.Flush();
        sw.Close();
        fs.Close();
    }
}
//csharp/6994