C#列挙の定義とその簡単な運用

using System;
using System.Collections.Generic;
using System.Text;
//           
namespace interfaceDemo
{
    //              ,              0，    
    //           ，    1，      ，            int  
    class TestEnum
    {
        enum WeekDay//    
        {
           Sunday,
           Monday,
           Tuesday,
           Wednesday,
           Thurday,
           Friday,
           Saturday
         }
        static void CheckDay(WeekDay day)
        {
            switch (day)
            { 
                case WeekDay.Sunday://     
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Monday:
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Tuesday:
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Wednesday:
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Thurday:
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Friday:
                    Console.WriteLine("   ");
                    break;
                case WeekDay.Saturday:
                    Console.WriteLine("   ");
                    break;
                default:
                    Console.WriteLine("    ");
                    break;
            }
        }
        static void Main(string[] args)
        {
            CheckDay(WeekDay.Monday);
            CheckDay((WeekDay)4);//           

            Console.ReadLine();
        }
    }
}
//  ：
//   
//