string nProt = string.Empty; if (cklTrans.GetItemChecked(0) & (go == true)) { go = false; txtLogTrans.Text += "Método: nfse.WsRecepcaoLoteRps.\r\n"; Application.DoEvents(); string tmp = nfse.WsRecepcaoLoteRps(txtPathLoteRPS.Text); txtLogTrans.Text += "#RETORNO: " + tmp + "\r\n\r\n"; if (tmp.IndexOf("rotocolo") > 0) { nProt = tmp.Replace("Protocolo de Recebimento: #", string.Empty).Trim(); go = true; } }