ArrayEnumerator.cs

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using System.Collections;
 
namespace System;
 
internal sealed class ArrayEnumerator : IEnumerator, ICloneable
{
    private readonly Array _array;
 
    private nint _index;
 
    public object Current
    {
        get
        {
            nint index = _index;
            Array array = _array;
            if ((nuint)index >= array.NativeLength)
            {
                if (index < 0)
                {
                    ThrowHelper.ThrowInvalidOperationException_InvalidOperation_EnumNotStarted();
                }
                else
                {
                    ThrowHelper.ThrowInvalidOperationException_InvalidOperation_EnumEnded();
                }
            }
            return array.InternalGetValue(index);
        }
    }
 
    internal ArrayEnumerator(Array array)
    {
        _array = array;
        _index = -1;
    }
 
    public object Clone()
    {
        return MemberwiseClone();
    }
 
    public bool MoveNext()
    {
        nint num = _index + 1;
        if ((nuint)num >= _array.NativeLength)
        {
            _index = (nint)_array.NativeLength;
            return false;
        }
        _index = num;
        return true;
    }
 
    public void Reset()
    {
        _index = -1;
    }
}