No, C# has plenty of features making functional programming possible, so it is definitely on the spectrum of FP languages. Let’s go at it from the other direct

No, C# has plenty of features making functional programming possible, so it is definitely on the spectrum of FP languages. Let’s go at it from the other direction - is Haskell functional? Because it has unsafe pointer access and unsafe IO, so it can pretty much express every C# program as well, right?