title: What is the fastest way to load XML into an XDocument?
body: <p>When you create a new <code>XDocument</code> using <code>XDocument.Load</code>, does it open the XML file and keep a local copy, or does it continuously read the document from the hard drive? If it does continuously read, is there a faster way to parse XML?</p>
  
  <pre><code>XDocument x = XDocument.Load("file.xml");
  </code></pre>