迭代器

using System;
using System.Collections;

namespace Enumerate
{
    public class DaysOfTheWeek : System.Collections.IEnumerable
    {
        string[] m_Days = { "Sun", "Mon", "Tue", "Wed", "Thr", "Fri", "Sat" };

        public System.Collections.IEnumerator GetEnumerator()
        {
            for (int i = 0; i < m_Days.Length; i++)
            {
                yield return m_Days[i];
            }

            //yield return m_Days[0];
            //yield return m_Days[1];
            //yield return m_Days[2];
            //yield return m_Days[3];
            //yield return m_Days[4];
            //yield return m_Days[5];
            // yield return m_Days[6];
        }
    }

    class TestDaysOfTheWeek
    {
        static void Main()
        {
            // Create an instance of the collection class
            DaysOfTheWeek week = new DaysOfTheWeek();

            // Iterate with foreach
            foreach (string day in week)
            {
                System.Console.Write(day + " ");
            }
            Console.Read();
        }
    }
}