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我知道如何实现非通用IEnumerable,如下所示:

using System;
using System.Collections;

namespace ConsoleApplication33
{
    class Program
    {
        static void Main(string[] args)
        {
            MyObjects myObjects = new MyObjects();
            myObjects[0] = new MyObject() { Foo = "Hello", Bar = 1 };
            myObjects[1] = new MyObject() { Foo = "World", Bar = 2 };

            foreach (MyObject x in myObjects)
            {
                Console.WriteLine(x.Foo);
                Console.WriteLine(x.Bar);
            }

            Console.ReadLine();
        }
    }

    class MyObject
    {
        public string Foo { get; set; }
        public int Bar { get; set; }
    }

    class MyObjects : IEnumerable
    { …