how to capture SOAP request from client side?

I have a C# client application that works with a web service using SOAP request. I've generate the requests C#开发者_高级运维 code from the services web address using VS05 WSDL. I want the client in case of an error to print to a log file the SOAP request and response.

It's need to be done in run time.

how can it be done?

You might check the following blog post for an example of writing a custom SoapExtension that will allow you to achieve this.