using System;

public class Program

{

    [Flags]

    enum Letters

    {

         X = 0,

         A = 1,

         B = 2,

         C = 4

    }

    [Flags]

    enum Letters2

    {

         X = 1,

         A = 2,

         B = 4,

         C = 8

    }

​

    public static void Main()

    {

        var letterA = Letters.A;

        if (letterA.HasFlag(Letters.X))

        {

            Console.WriteLine("Letter A includes X!");

        }

        else

        {

            Console.WriteLine("Letter A does not include X.");

        }

        var letter2A = Letters2.A;

        if (letter2A.HasFlag(Letters2.X))

        {

            Console.WriteLine("Letter2 A includes X!");

        }

        else

        {

            Console.WriteLine("Letter2 A does not include X.");

        }

    }

}