i have an c# windows service which is calling a web service, i need to be calling a web service provided by a 3rd party which is fine. i have added a reference to it and can see all the functions which i need to call. my problem is that before i call this i need to call their authentication service which will provide me with a security token to use during that session. they have sent me an example of the SOAP message which needs to be sent, an the...