Передать Soap header в готовый web service

SessionService WS = new SessionService();
СreateSessionRequest CreateReq = new CreateSessionRequest();
 
string strPasswordCertificate = "123456";
string strCertificate = "C:/Test/AUTH_RSA_db79bb07b4722c042e025979b3b11995fc46765b.p12";
X509Certificate x509_CertAUTH = new X509Certificate(strCertificateFilePathAUTH, strPasswordCertificate);
string strCertAUTH = x509_CertAUTH.ToString();
 
CreateReq.x509Certificate = strCertAUTH;
 
string strIIN = "123456789021";
 
CreateReq.tin = strIIN;
WS.createSession(CreateReq);

SessionService WS = new SessionService();
СreateSessionRequest CreateReq = new CreateSessionRequest();
 
string strPasswordCertificate = "123456";
string strCertificate = "C:/Test/AUTH_RSA_db79bb07b4722c042e025979b3b11995fc46765b.p12";
X509Certificate x509_CertAUTH = new X509Certificate(strCertificateFilePathAUTH, strPasswordCertificate);
string strCertAUTH = x509_CertAUTH.ToString();
 
CreateReq.x509Certificate = strCertAUTH;
 
string strIIN = "123456789021";
 
CreateReq.tin = strIIN;
 
string _userName = "123456789011";
string _UserPassword = "TestPass123"
 
UsernameToken userToken;
userToken = new UsernameToken(_userName, _UserPassword, PasswordOption.SendPlainText);
 
SoapContext requestContext = WS.RequestSoapContext;
requestContext.Security.Tokens.Add(userToken);
 
WS.createSession(CreateReq);

System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

namespace WindowsFormsApplication1
{
    public class MySoapSecurityHeader : MessageHeader
    {
        private readonly UsernameToken _usernameToken;
 
        public MySoapSecurityHeader(string username, string password)
        {
            _usernameToken = new UsernameToken(string.Empty, username, password);
        }
 
        public MySoapSecurityHeader(string id, string username, string password)
        {
            _usernameToken = new UsernameToken(id, username, password);
        }
 
        public override string Name
        {
            get { return "Security"; }
        }
 
        public override string Namespace
        {
            get { return "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"; }
        }
 
        protected override void OnWriteHeaderContents(XmlDictionaryWriter writer, MessageVersion messageVersion)
        {
            XmlSerializer serializer = new XmlSerializer(typeof(UsernameToken));
            serializer.Serialize(writer, _usernameToken);
        }
    }
 
 
    [XmlRoot(Namespace = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd")]
    public class UsernameToken
    {
        public UsernameToken()
        {
        }
 
        public UsernameToken(string id, string username, string password)
        {
            Id = id;
            Username = username;
            Password = new Password() { Value = password };
        }
 
        [XmlAttribute(Namespace = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd")]
        public string Id { get; set; }
 
        [XmlElement]
        public string Username { get; set; }
 
        [XmlElement]
        public Password Password { get; set; }
    }
 
    public class Password
    {
        public Password()
        {
            Type = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText";
        }
 
        [XmlAttribute]
        public string Type { get; set; }
 
        [XmlText]
        public string Value { get; set; }
    }
}

//The path to the certificate.
string certPath = "C:/AUTH_RSA256_e9f5afab50193175883774ec07bac05cb8c9e2d7.p12";
 
//Password to signing a certificate
string certPassword = "123456";
 
//IIN or BIN persom who signing ESF on esf_gov site
var tin = "123456789021";
 
//Load the certificate into an X509Certificate object.
X509Certificate x509Cert = new X509Certificate(certPath, certPassword);
 
//Transfer sertificate to string value of base64
var certPEM = ExportToPEM(x509Cert);
 
 
using (SessionServiceClient client = new SessionServiceClient())
            {
                using (new OperationContextScope(client.InnerChannel))
                {
                    OperationContext.Current.OutgoingMessageHeaders.Add(
                        new MySoapSecurityHeader("123456789011", "TestPass123"));
 
                    //Create session for a work with site ESF
                    CreateSessionRequest createSessionRequest = new CreateSessionRequest
                    {
                        tin = tin,
                        x509Certificate = certPEM
                    };
 
                    var response = client.createSession(createSessionRequest);
                    MessageBox.Show("Session ID is: " + response.sessionId, "Information message",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
 
                    //Close session for a work with site ESF
                    CloseSessionRequest closeSessionRequest = new CloseSessionRequest
                    {
                        sessionId = response.sessionId,
                        tin = tin,
                        x509Certificate = certPEM
                    };
 
                    var closeResponse = client.closeSession(closeSessionRequest);
                }
            }
 
        }
        public static string ExportToPEM(X509Certificate cert)
        {
            //Export certificate, get baty array, convert in base64 string
            return Convert.ToBase64String(cert.Export(X509ContentType.Cert), Base64FormattingOptions.InsertLineBreaks);
        }