> For C# equivalence, imagine if all the most easily accessible functions operated on the concrete `List` to avoid having to introduce interfaces and all had du

> For C# equivalence, imagine if all the most easily accessible functions operated on the concrete `List` to avoid having to introduce interfaces and all had duplicates taking an IEnumerable instead (that doesn't quite work as C# uses methods but there you are). Thanks! Considering 'List' is one of the few structures of FP I understand, that makes actual sense.