I have been working through the examples illustrated in Stefan Wick's blog on UWP with Desktop Extensions.
See: uwp-with-desktop-extension-part-1 to uwp-with-desktop-extension-part-3
While I can build the examples in VS2019 and debug the UWP project, (uwp.exe) I cannot debug the FullTrust app which is run as service, (FullTrust.exe) This is the case for all 3 of the examples illustrated in the article. The example that most closely fits my needs is illustrated in the 3rd of Stefan's examples.
I cloned the projects from Github: UWP-FullTrust
Reading all the documentation on debugging packaged apps it should be straight forward but I can't figure it out. FullTrust.exe does not show as a module in the debugger.