Hi, when we attach a file to the SOAP request, how is it sent to the service?

I have been using SOAPUI to build and test an application and wanted to know how the tool sends the attachment to the service?

Basically we have a client .Net application which needs to call the SOAP service build but we are unable to figure out how to send the attachment (XML file) from .Net. I need to replicate the SOAPUI behavior in .Net and am facing difficulty figuring it out.

The service works perfectly fine when attaching the file through SOAPUI

 

Thanks!