SOAPUI to csharp

What is the best way to create C Sharp code for a service successfully tested through SOAP UI, that uses WSSE ecurity headers

What is the algorithm behind the WSSE usename token  that SOAP UI uses?   I am trying to generate one ( including the NOnce for a .NET ( Csharp ) system

The Proxy classes that are generated in Visual Studio omit half the relevant classes. 

Building a raw soap packet to upload to the Service has not liked any manually built header

Thanks in advance