using System;

[Flags]

enum DaysOfWeek

{

  Sun = 1 << 0,

  Mon = 1 << 1,

  Tue = 1 << 2,

  Wed = 1 << 3,

  Thu = 1 << 4,

  Fri = 1 << 5,

  Sat = 1 << 6

}

public class Program

{

    public static void Main()

    {

        DaysOfWeek workingDays = (DaysOfWeek) 2 + 4 + 8 + 16 + 32;

        Console.WriteLine(workingDays);

        Console.WriteLine((DaysOfWeek.Fri & workingDays));

        Console.WriteLine((DaysOfWeek.Fri | workingDays));

        Console.WriteLine((DaysOfWeek.Fri ^ workingDays));

        Console.WriteLine((DaysOfWeek.Sat & workingDays));

        Console.WriteLine((DaysOfWeek.Sat | workingDays));

        Console.WriteLine((DaysOfWeek.Sat ^ workingDays));

        DaysOfWeek allDays = (DaysOfWeek) 1 + 2 + 4 + 8 + 16 + 32 + 64;

        var weekends = allDays ^ workingDays;

        Console.WriteLine(weekends);

        Console.WriteLine(((DaysOfWeek)127) ^ weekends);

​

    }

}