Enum

namespace VacationDays
{
    enum Days
    {
        Sunday,
        Monday,
        Tuesday,
        Wednesday,
        Thursday,
        Friday,
        Saturday
    }

    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Please enter your first choice for vacation: ");
            Days day1 = (Days)Enum.Parse(typeof(Days), Console.ReadLine());

            Console.Write("Please enter your second choice for vacation: ");
            Days day2 = (Days)Enum.Parse(typeof(Days), Console.ReadLine());

            Console.WriteLine();
            Console.WriteLine("You selected {0}:{1} and {2}:{3}", day1, (int)day1, day2, (int)day2);
            Console.ReadKey();
        }
    }
}