C#枚举

using System;

namespace EnumApplication {

   class EnumProgram {
      enum Days { Sun, Mon, tue, Wed, thu, Fri, Sat };

      static void Main(string[] args) {
         int WeekdayStart = (int)Days.Mon;
         int WeekdayEnd = (int)Days.Fri;
         Console.WriteLine(Monday: {0}, WeekdayStart);
         Console.WriteLine(Friday: {0}, WeekdayEnd);
         Console.ReadKey();
      }
   }
}