private async void BtnDlCh_Click(object sender, EventArgs e) { string saveFile = path + "\\" + lstbTitle.SelectedItem.ToString(); if (cmbChapter.SelectedIndex > -1) { await ch.DownloadChapter(lstbTitle.SelectedItem.ToString(), cmbChapter.SelectedItem.ToString(), saveFile + "\\" + cmbChapter.SelectedItem.ToString()); } }