const string apiUrl = "https://facturaelectronica.dian.gov.co/habilitacion/B2BIntegrationEngine/FacturaElectronica",
        apiUserName = "8ac82326-3016-430f-8d69-9efc4bcefd8f";

        string apiPassword = "6361b7b5322acb07ced00a35a85a4cc5183da3a42ede0b07f578067a18425a55";

        EndpointAddress endpointAddress = new EndpointAddress(new Uri(apiUrl));

        SecurityBindingElement securityElement = SecurityBindingElement.CreateUserNameOverTransportBindingElement();
        securityElement.AllowInsecureTransport = false;
        securityElement.EnableUnsecuredResponse = true;
        securityElement.IncludeTimestamp = false;

        TextMessageEncodingBindingElement encodingElement = new TextMessageEncodingBindingElement(MessageVersion.Soap11, Encoding.UTF8);
        HttpsTransportBindingElement transportElement = new HttpsTransportBindingElement();

        CustomBinding binding = new CustomBinding(securityElement, encodingElement, transportElement);

        //basic prueba
        BasicHttpSecurityMode securityMode = new BasicHttpSecurityMode();
        BasicHttpBinding binding2 = new BasicHttpBinding(securityMode);

        // Then assign username and password based on the proxy. For example -
        //var remoteAddress = new EndpointAddress("");
        WSDian.facturaElectronicaPortNameClient service = new WSDian.facturaElectronicaPortNameClient(binding, endpointAddress);
        //WSDian.facturaElectronicaPortNameClient service = new WSDian.facturaElectronicaPortNameClient(binding2, endpointAddress);
        service.ClientCredentials.UserName.UserName = apiUserName;
        service.ClientCredentials.UserName.Password = apiPassword;
        var Obtnonce = GetNonce();
        byte[] archivo = FileToByteArray(@"c:tempws_f0816002834000000000A.zip");

        service.Open();

        WSDian.EnvioFacturaElectronica enviofactura = new WSDian.EnvioFacturaElectronica();

        enviofactura.NIT = "816002834";
        enviofactura.InvoiceNumber = "10";
        enviofactura.IssueDate = Convert.ToDateTime("2018-01-01 05:00:00");
        enviofactura.Document = archivo;

        //temporal

        WSDian.EnvioFacturaElectronicaPeticion envioFacturaElectronicaPeticion = new WSDian.EnvioFacturaElectronicaPeticion();
        WSDian.EnvioFacturaElectronicaRespuesta envioFacturaElectronicaRespuesta = new WSDian.EnvioFacturaElectronicaRespuesta();
        WSDian.AcuseRecibo acuseRecibo = new WSDian.AcuseRecibo();
        WSDian.ReceivedInvoice receivedInvoice = new WSDian.ReceivedInvoice();
        WSDian.facturaElectronicaPortNameClient facturaElectronicaPortNameClient = new WSDian.facturaElectronicaPortNameClient();

        envioFacturaElectronicaPeticion.EnvioFacturaElectronicaPeticion1 = enviofactura;
        var versionSoap = acuseRecibo.GetType();
        acuseRecibo = service.EnvioFacturaElectronica(envioFacturaElectronicaPeticion.EnvioFacturaElectronicaPeticion1);