Receive an XML document using VS2005

A server app that submits XML purchase orders to a vendor WS needs to receive an XML document in return as a validation message, While the vendor WS takes the XML purchase order, the validation message will come back as another XML document. That XML documenr may be received by a web page or a WS.  Is a web page simpler and easier to implement than a WS? Please advise a good way to create such a web page or WS using VS2005? Thanks.
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You can use  System.Net.WebClient class to retrieve any document(xml, html etc) from internet.

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