using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(nameof(Foo.A));

        Console.WriteLine(GetEnumName(Bar.C));

    }

    public static string GetEnumName(object o)

    {

        return o.GetType().Name;

    }

    public enum Foo

    {

        A = 1,

        B = 3

    }

    public enum Bar

    {

        C,

        D

    }

}