Sorry, I mean that writing functional code in C# is way more verbose than in Kotlin.

C# is already more verbose because it lacks things like union types (and so you need to have a fallback branch in every switch) and for example everything needs to be nested in a class.

Then you also have the fact that there is no "val" keyword (which makes things clearer imo) and the fact that it's generics type inferencing is only based on method arguments, which really adds a lot of noise to almost all generic functions.

I was using LanguageExt [0] in C# and I am now using Arrow [1] in Kotlin, and while LanguageExt is really nice for addressing some C# shortcomings, for me this is night and day.

[0] https://github.com/louthy/language-ext

[1] https://arrow-kt.io/