I am running a .Net application under Mono for months now. I did an
apt-get upgrade and then after trying to run the application I get
NullReference unhandled-exceptions in class constructors. I removed and reinstalled Mono with no luck.
It seems to throw these exceptions when trying to run code from Referenced Libraries (Raspberry.IO.GeneralPurpose). I don't know if or why the libraries are not loaded correctly anymore. There are no other error message and I'm really stuck.