title: Convert a dictionary<string,string> to xml
body: <p>I want to convert a dictionary&lt;string,string&gt; to this xml:</p>
  
  <pre><code>&lt;root&gt;
      &lt;key&gt;value&lt;/key&gt;
      &lt;key2&gt;value2&lt;/key2&gt;
  &lt;/root&gt;
  </code></pre>
  
  <p>Can this be done using some fancy linq?</p>