XmlNodeListEnumerator.cs

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using System.Collections;
 
namespace System.Xml;
 
internal sealed class XmlNodeListEnumerator : IEnumerator
{
    private readonly XPathNodeList _list;
 
    private int _index;
 
    private bool _valid;
 
    public object Current
    {
        get
        {
            if (_valid)
            {
                return _list[_index];
            }
            return null;
        }
    }
 
    public XmlNodeListEnumerator(XPathNodeList list)
    {
        _list = list;
        _index = -1;
        _valid = false;
    }
 
    public void Reset()
    {
        _index = -1;
    }
 
    public bool MoveNext()
    {
        _index++;
        int num = _list.ReadUntil(_index + 1);
        if (num - 1 < _index)
        {
            return false;
        }
        _valid = _list[_index] != null;
        return _valid;
    }
}