如何为多个foreach实现正确的IEnumerator接口？

using System;
using System.Collections;

public class CustomEnumerator : IEnumerator
{
    private int _position = -1;
    private int[] _data = new int[] { 1, 2, 3, 4, 5 };

    public object Current
    {
        get
        {
            if (_position < 0 || _position >= _data.Length)
            {
                throw new InvalidOperationException("Enumeration has either not started or has already finished.");
            }
            return _data[_position];
        }
    }

    public bool MoveNext()
    {
        _position++;
        return (_position < _data.Length);
    }

    public void Reset()
    {
        _position = -1;
    }
}

CustomEnumerator customEnumerator = new CustomEnumerator();

foreach (int item in customEnumerator)
{
    Console.WriteLine(item);
}