title: Change XML root element name
body: <p>I have XML stored in string variable:</p>
  
  <pre><code>&lt;ItemMasterList&gt;&lt;ItemMaster&gt;&lt;fpartno&gt;xxx&lt;/fpartno&gt;&lt;frev&gt;000&lt;/frev&gt;&lt;fac&gt;Default&lt;/fac&gt;&lt;/ItemMaster&gt;&lt;/ItemMasterList&gt;
  </code></pre>
  
  <p>Here I want to change XML tag <code>&lt;ItemMasterList&gt;</code> to <code>&lt;Masterlist&gt;</code>. How can I do this?</p>