title: Loading modules in IronPython
body: <p>I am confused about the two ways to import modules in IronPython.</p>
  
  <p>On the one hand, the tutorial documentation that comes with IronPython 2.7.4 states that you can do it using the regular <code>import</code> syntax:</p>
  
  <pre><code>import System
  from System import Xml
  </code></pre>
  
  <p>This works as I would expect.</p>
  
  <p>On the other hand, many resources on the internet state that the way to import modules is by using the <code>clr</code> module like so:</p>
  
  <pre><code>import clr
  clr.AddReference("System.Xml")
  </code></pre>
  
  <p>What is the difference between the two methods?</p>