Throw NotImplementedException()

[nkast]

I would like the option to have methods and properties throw a NotImplementedException. Optionally I'd like to set a custom message.

Sometimes the bait-switch assemblies make their way to the output directory. Usually due to a misconfiguration. It takes a while to fix it because it's not clear at first what's the problem, the PCL library fails silently and the app crashes later in the code.

The exception message could give some more information, ex. "'Library.dll' is a Bait-and-Switch PCL. See: https://github.com/Ark-kun/Piranha/"