param.generatecodefiles.xml

<?xml version="1.0" encoding="utf-8"?>
<xsd xmlns='http://microsoft.com/dotnet/tools/xsd/' output='Fritz\Serialization'>
  <generateClasses language='CS' namespace='Fritz.Serialization' options='properties'>
    <schema>pbook.xsd</schema>
  </generateClasses>
</xsd>