How to sign a SOAP request with WCF

Question

I have an 3rd party SOAP web service. I need to make a call to one of its methods. The request needs to be signed. How can I sign the request?

Answer 1

The following is a question that was asked about using WCF to use the Amazon SOAP service which requires signing. I think the answer gives a great example, which might help with your situation.

How to sign an Amazon web service request in .NET with SOAP and without WSE

Edit: There was evidently some confusion about the link to this other StackOverflow question. I would like to point out the highest voted chosen answer. It is most definitely a WCF solution. You will notice the class SigningMessageInspector which inherits from IClientMessageInspector (a WCF interface). I think this section might help you.