private void buttonAdd_Click(object sender, EventArgs e)
        {
            DateTime dt = dateTimePickerDate.Value.Date +
                          dateTimePickerTime.Value.TimeOfDay;
            DLSaveFile m = new DLSaveFile(dt, textBoxNameDL.Text);

            lst.Add(m);
            lst.SaveToFile();

            Close();
        }
 public void Add(DLSaveFile m)
 {
     listDL.Add(m);
 }