title: Add a namespace to a custom XML file
body: <p>I am adding a custom XML file to a Windows Phone app I am developing.  The XML file itself is just some data I've structured and added to it, the data or file itself isn't hosted online, it will be packaged in with the app.</p>
  
  <p>In other apps I've created that used live XML returned from some sort of webservice, I used XDocument and XNamespace to parse and read the nodes and data.  The XNamespace was always pointing to something like: "<a href="http://www.theplaceIgettheInfo/returnsomething/resultshere" rel="nofollow">http://www.theplaceIgettheInfo/returnsomething/resultshere</a>" which was returned in the XML data that my app received.</p>
  
  <p>However this is just my own custom XML file that I've started adding nodes and data to, there is no namespace defined.</p>
  
  <p>How do I define a namespace in my own XML file in this type of a scenario?  Does it have to be some website address that actually exists?  What format does it need to be in?</p>