getSecurityHeaderXML

private System.Xml.XmlDocument getSecurityHeaderXML(str _username, str _passwordDigest, 
                                                    str _encodedNonce, str _creationDate)
{
    System.Xml.XmlDocument xDoc;
    System.Xml.XmlNode xmlRoot;
    System.Xml.XmlElement securityElement;
    System.Xml.XmlElement usernameTokenElement;
    System.Xml.XmlElement usernameElement;
    System.Xml.XmlElement passwordElement;
    System.Xml.XmlElement nonceElement;
    System.Xml.XmlElement createdElement;

    str username = _username;
    str passwordDigest = _passwordDigest;
    str encodedNonce = _encodedNonce;
    str creationDate = _creationDate;

    xDoc = new System.Xml.XmlDocument();

    xmlRoot = xDoc.CreateElement("root");

    xDoc.AppendChild(xmlRoot);

    usernameTokenElement = xDoc.CreateElement("wsse", "UsernameToken", 
                    "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");

    xmlRoot.AppendChild(usernameTokenElement);

    usernameElement = xDoc.CreateElement("wsse", "Username", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");

    usernameElement.set_InnerText(username);

    usernameTokenElement.AppendChild(usernameElement);

    passwordElement = xDoc.CreateElement("wsse", "Password", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");

    passwordElement.set_InnerText(passwordDigest);

    passwordElement.SetAttribute("Type", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-tokenprofile-1.0#PasswordDigest");

    usernameTokenElement.AppendChild(passwordElement);

    nonceElement = xDoc.CreateElement("wsse", "Nonce", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");

    nonceElement.set_InnerText(encodedNonce);

    nonceElement.SetAttribute("EncodingType", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-messagesecurity-1.0#Base64Binary");

    usernameTokenElement.AppendChild(nonceElement);

    createdElement = xDoc.CreateElement("wsu", "Created", 
      "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");

    createdElement.set_InnerText(creationDate);

    usernameTokenElement.AppendChild(createdElement);

    return xDoc;
}