using System;

using System.Xml.Serialization;

​

public class Program

{

    public static void Main()

    {

        var serializer = new XmlSerializer(typeof(SoapEnvelope));

​

        var envelope = new SoapEnvelope

        {

            Header = new Header

            {

                Security = new Security

                {

                    MustUnderstand = 1,

                    UsernameToken = new UsernameToken

                    {

                        Username = "someuser",

                        Password = new Passwords

                        {

                            Type =

                                "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#passwordtext",

                            Password = "somepass"

                        }

                    }

                }

            }

        };

​

        var ns = new XmlSerializerNamespaces();

        ns.Add("soap-env", "http://schemas.xmlsoap.org/soap/envelope/");

        ns.Add("wsse", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");

​

        serializer.Serialize(Console.Out, envelope, ns);

    }

}

​

[XmlRoot(ElementName = "Envelope", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")] //

public class SoapEnvelope

{

    public Header Header { get; set; }

​

    [XmlElement("Body")]

    public UsernameToken GenericBody { get; set; }

}

​

​

[XmlRoot(ElementName = "Security", Namespace = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd")]

public class Header

{

    public Security Security { get; set; }

}

​

public class Security

{

    [XmlAttribute("mustunderstand", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]

    public int MustUnderstand { get; set; }

​

    public UsernameToken UsernameToken { get; set; }

}

​

public class UsernameToken

{

    public string Username { get; set; }

​

    public Passwords Password { get; set; }

}

​

public class Passwords

{

    [XmlAttribute("type")]

    public string Type { get; set; }

    [XmlText]

    public string Password { get; set; }

}