title: PDFsharp missing the Xps namespace
body: <p>I need PDFsharp's XPS functionality to convert from WPF -> XPS -> PDF. I've tried referencing PDFsharp 1.20, 1.30, 1.31 and also 1.32, but none of these contain the mystical <code>PdfSharp.Xps</code> namespace that everyone is talking about. Apparently 1.31 was the last version to include the XPS functionality, but I didn't find anything in there either.</p>
  
  <p>This is the one line of code I need it for:</p>
  
  <pre><code>//error: 'Xps' is not a member of 'PdfSharp'
  var test = PdfSharp.Xps.XpsModel.XpsDocument.Open(_MemoryStream);
  </code></pre>