3.3.0
Both Either<A, B> and Either<A, B, C> just got a lot better! Instead of manually checking which discriminant the either is, you can check directly using IsA, IsB and IsC which does what you'd expect. In addition to that, there's also SelectA, SelectB and SelectC for an enumerable of eithers. Similar to SelectSome, they allow you to iterate over all Eithers that are A.. or B or C.