View XML to be sent over web reference via Visual Studio

Could someone tell me how to view the X开发者_如何学PythonML to be sent via web reference while debugging Visual Studio (i.e. see the actual XML with all tags too?) I'm having a "There is an error in this XML Document (4, 56)." error.

Any help would be much appreciated.

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Any HTTP debugging tool should suffice, e.g. Fiddler