Thanks for the guidance Stephen
For complicated reasons, I do not have the IIS set up for the examples, so unable to test that way.
I did not recompile the WebApp that is on the Production computer as I had made some changes that I wasn't ready to deploy yet, so maybe that it the golden ticket.... Only update the runtime when I am ready to deploy a freshly compiled WebApp.exe, what do you think?
I know that I have a single desktop app that ran OK after I installed .159, and it hadn't been recompiled.... but maybe the WebApp is different in that regard.
Mike