[tonicbbleking]

Discriminated unions is one of those features that everyone talks about, but never gets championed. Wish C# 10 already had this feature. https://github.com/dotnet/csharplang/discussions/2962

[keithnz]

you can actually do them pretty easily in C# without language support anyways.

for instance, the F# example from https://fsharpforfunandprofit.com/posts/designing-for-correc...

can be done in C# like https://gist.github.com/keithn/ceeeed5f7eb567e1b2333747065d1...

almost similar amount of code, however, no exhaustive checking. Not that I find that to be much of a problem, but it would be nice

[Smaug123]

But who needs sum types when you have the visitor pattern :troll_face:

https://blog.ploeh.dk/2018/06/25/visitor-as-a-sum-type/

[throw868788]

Maybe try F#? I know it isn't always an option but if you can, especially recently, its been quite productive to work in.