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?

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