C# SOAP WSSE Request with certificate

I need add to a existing C# Project 4.6.x (with source code). I need to allow send a valid SOAP Sign Request from my server ( Azure Virtual Machive with Fixed public IP) to external organization SOAP Endpoint (no Dotnet webservice, no web reference, it's external CGI SOAP Services). The Scenario: - Only my server is allowed to send request to external request (my Public IP Address is registered on the external organization) - The external endpoint is only one (https://<[login to view URL]>/<endpoint>.CGI) - The SOAP request is different by diferent actions - Each request will should SOAP 1.2 with XML-Signature - The dummy is just for one request (after I will go the replicate the process to the another request) I think those the steps the reach (you can think different): * Pickup the certificate from Windows Certificate Store * Prepare SOAP Request * Sign the SOAP REquest * Add Custom Signed Header to SOAP Request (WSSE) * Call the WebMethod * Catch the SOAP Response * Map response value to variables. The checkpoint to validated is: * Build a valid XML Request with data from variables * Retrieve certificate from Windows Trust store certificate * Sign the XML Request and add the sign dato to SOAP XML Header * Call to the external endpoint and get valid response * Retrieve valid response * Map response XML data to variables. If you need a XML request and response examples to review, please tell me.