SerializationInfoEnumerator.cs

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using System.Collections;
 
namespace System.Runtime.Serialization;
 
public sealed class SerializationInfoEnumerator : IEnumerator
{
    private readonly string[] _members;
 
    private readonly object[] _data;
 
    private readonly Type[] _types;
 
    private readonly int _numItems;
 
    private int _currItem;
 
    private bool _current;
 
    object? IEnumerator.Current => Current;
 
    public SerializationEntry Current
    {
        get
        {
            if (!_current)
            {
                throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
            }
            return new SerializationEntry(_members[_currItem], _data[_currItem], _types[_currItem]);
        }
    }
 
    public string Name
    {
        get
        {
            if (!_current)
            {
                throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
            }
            return _members[_currItem];
        }
    }
 
    public object? Value
    {
        get
        {
            if (!_current)
            {
                throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
            }
            return _data[_currItem];
        }
    }
 
    public Type ObjectType
    {
        get
        {
            if (!_current)
            {
                throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
            }
            return _types[_currItem];
        }
    }
 
    internal SerializationInfoEnumerator(string[] members, object[] info, Type[] types, int numItems)
    {
        _members = members;
        _data = info;
        _types = types;
        _numItems = numItems - 1;
        _currItem = -1;
    }
 
    public bool MoveNext()
    {
        if (_currItem < _numItems)
        {
            _currItem++;
            _current = true;
        }
        else
        {
            _current = false;
        }
        return _current;
    }
 
    public void Reset()
    {
        _currItem = -1;
        _current = false;
    }
}