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Python maybe. C# (at least when i used it, 3.0)is basically Java and is very object oriented.

C# is fundamentally OO (especially considering the .NET framework that it's tightly bound to in real-world use), but can be used in functional ways. C# has first-class functions and closures. The LINQ stuff introduced in 3.5 is amazing to work with, giving C# many capabilities of a list-processing language also. I love C# and would definitely call it multiparadigm.

C# has closures but why do you say it has first class functions? I'm pretty new to C# but I thought all functions still must be members of a class. Yes you can pass delegates to, or return them from, a function but they cannot stand alone. Isn't that true?

> but can be used in functional ways.

Every language can be used in functional ways, including Fortran, Cobol and assembly language.

I think the main question is "what is idiomatic in that language?" and in that case, C#, even with LINQ, is still not functional (in the sense that Erlang, Haskell, OCaml and Scheme surely are, and Python sometimes is).

For example, when you use select in c# over a user-defined collection, the enumerator might modify global state. It would be bad practice, but it's not unheard of.

I wouldn't say c# is functional.

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