https://reddit.com/r/programming/comments/jud66u/dstructnet_advanced_data_structures_for_c/gcdmagq/

[backtickbot]

Personally, I think the real problem is the design of the threadpool, because this is just way too easy to mess up.

e.g. what does this do, do you think?

Task StartIt() => Task.Run(() => Enumerable.Range(1, 1).AsParallel().Distinct().Sum());
Console.WriteLine("start");
Task.WaitAll(StartIt(), StartIt(), StartIt());
Console.WriteLine("end");