title: Where do I find Microsoft.Tools.WindowsInstallerXml.dll?
body: <p>I am trying to write an extension for Wix by subclassing CompilerExtension but I can't locate the dll to reference the Microsoft.Tools.WindowsInstallerXml namespace. I searched on the web with no luck.</p>
  
  <p>Any ideas where this can be found?</p>
  
  <p>Mark</p>