title: WiX XmlFile setValue on multiple lines
body: <p>I'm using the tag <code>&lt;util:XmlFile&gt;</code> with setValue to update the content of a xml file during instalation but it only replaces the first entry found.</p>
  
  <p>As far I as googled, the design only updates the first one.  </p>
  
  <p>Has anyone faced this trouble?<br>
  Any other goood way to solve this issue?</p>