ASP.NET - Test an incoming xml file

Hi I have a webservice that load an external xml file that will be request from  my webservice by a client.
Now what I want is to test it out.Please can someone help how can I perform that? is there any tool to do that kind of test?

Try to load it into an XmlDocument.  You may also want to look into creating an XmlSchema that you can use to validate the structure of the Xml.