C# - accessing service reference with the headers Negotiate, Ntlm

app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="NintexWorkflowWSSoap" closeTimeout="00:01:00"
                    openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                    allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                    maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                    messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                    useDefaultWebProxy="true">
                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                  <security mode="TransportCredentialOnly">
                    <transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
                        <message clientCredentialType="UserName" algorithmSuite="Default" />
                  </security>
                </binding>
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://intranet.aDomain.net/_vti_bin/nintexworkflow/workflow.asmx"
                binding="basicHttpBinding" bindingConfiguration="NintexWorkflowWSSoap"
                contract="Nintex.Service.NintexWorkflowWSSoap" name="NintexWorkflowWSSoap" />
        </client>
    </system.serviceModel>
</configuration>

comment.mkdown

this gist solves the MessageSecurityException "The HTTP request is unauthorized with client authentication scheme 'Ntlm'. The authentication header received from the server was 'Negotiate,NTLM'.".

programm.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Principal;
using System.ServiceModel;

namespace TheTestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            var client = new Nintex.Service.NintexWorkflowWSSoapClient("NintexWorkflowWSSoap");
            client.ClientCredentials.Windows.AllowedImpersonationLevel = TokenImpersonationLevel.Impersonation;
            client.ClientCredentials.Windows.AllowNtlm = true;
            client.ClientCredentials.Windows.ClientCredential.Domain = "aDomain";
            client.ClientCredentials.Windows.ClientCredential.UserName = "aName";
            client.ClientCredentials.Windows.ClientCredential.Password = "*********";

            var result = client.PublishFromNWFXml(m, "Request List", "Approval", false);
        }
    }
}

Thank you very much!!! This gist saved me lots of time!

AllowNtlm = true is deprecated. My solution is to set NTLM in clientCredentialType in app.config