using System;

using System.Collections;

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namespace INumerable

{

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    public class Program

    {

        public static void Main()

        {

            Mass mass = new Mass();

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​

​

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            foreach (int i in mass)

                Console.Write(i + "\t");

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            mass.MoveNext();

            Console.Write( "\n" + mass.Current );

            mass.MoveNext();

            Console.Write(  "\n" + mass.Current );

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            Console.ReadLine();

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        }

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​

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    }

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    public class Mass : IEnumerable, IEnumerator

    {

        int[] mass = { 0, 1, 2, 3 };

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        int index = -1;

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        public IEnumerator GetEnumerator()

        {

            return mass.GetEnumerator();

        }

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        public bool MoveNext()

        {

            if (index == mass.Length - 1)

            {

                Reset();

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                return false;

            }

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            index++;

            return true;

        }

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        public void Reset()

        {

            index = -1;

        }

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        public object Current

        {

            get

            {

                return mass[index];

            }

        }

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​

​

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    }

}

​

​