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

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?