void saveDownloadList()
        {
            var list = MTDOList.Select(x => x.dorg);
            var json = JsonConvert.SerializeObject(list);

            Properties.Settings.Default.DownloadList = json;
            Properties.Settings.Default.Save();
        }
        void timer1_Tick(object sender, EventArgs e)
        {
            foreach (var item in MTDOList.Select(x => x.dorg))
            {
                WriteItem(item);
            }

            disableButtonsIfActive();
        }