title: How do I add C# methods to an existing large wix script
body: <p>We have an existing wix script that is pretty complex &amp; long. All the CustomActions are performed with inline vbscript.</p>
  
  <p>I want to switch some of those actions from vbscript to C#. All the examples everywhere start with "create a wix project in VisualStudio...". Is there any example out there about how to add in C# code to an existing wix project? One where it is built using the old school wix command line apps?</p>