I'm going to have to ask one of the #C# experts I know. Exactly how hard an ActivityPub library would be to write in .NET languages. If it wouldn't be too hard, then, maybe I can start with something in front of the #pterotype progression. Not sure, though.
@cambridgeport90 No harder than writing it in any other language really. C#, just like all propriety MS crap is a pretty shitty choice for a language but it isnt particularly difficult to write for it. At least as long as your ok with using windows to run your software (you can run it on linux but mono is buggy and no one uses it).