using System;

public class Program

{

    [Flags]

    public enum Color {

        None = 0,

        White = 1,

        Black = 1 << 1,

        Blue = 1 << 2,

        Yellow = 1 << 3,

        Red = 1 << 4,

        Green = 1 << 5,

        Pink = 1 << 6,

        Orange = 1 << 7

    }

    public static void Main()

    {

        Color c = Color.White;

        int i = 1;

        Console.WriteLine(i++.ToString() + ": " + ((int)c).ToString() + " : " + c );

        c = Color.Blue;

        Console.WriteLine(i++.ToString() + ": " + ((int)c).ToString() + " : " + c );

        c = Color.Blue | Color.White;

        Console.WriteLine(i++.ToString() + ": " + ((int)c).ToString() + " : " + c );

        if((c & Color.Blue) == Color.Blue)

            Console.WriteLine(i++.ToString() + ": " + ((int)c).ToString() + " : " + c );

        if((c & Color.Blue) == Color.Black)

            Console.WriteLine(i++.ToString() + ": " + ((int)c).ToString() + " : " + c );

    }

}

​

​