using System;

​

public class Program

{

    [Flags]

    enum stuff

    {

        one = 1 << 0,

        two = 1 << 1,

        all = ~(1 << 1),

        everythingButFour = one | two,

        four = 1 << 2

    }

    static void PrintMyEnum(stuff s)

    {

        Console.WriteLine("-------------");

        if ((s & stuff.one) == stuff.one) Console.WriteLine("One's included");

        if ((s & stuff.two) == stuff.two) Console.WriteLine("Two's included");

        if ((s & stuff.four) == stuff.four) Console.WriteLine("Four's included");

        Console.WriteLine("-------------");

    }

    public static void Main(string[] args)

    {   

        Console.WriteLine((int)stuff.one);

        Console.WriteLine((int)stuff.two);

        Console.WriteLine((int)stuff.all);

        PrintMyEnum(stuff.all);

        PrintMyEnum(stuff.everythingButFour);

        PrintMyEnum(stuff.one | stuff.two | stuff.four);

    }

}