public class AutoIncrementIdFactory
{
    private uint _currentID = 0;

    public uint NextId()
    {
        return ++_currentID;
    }

    public uint PeekId()
    {
        return _currentID;
    }

    public void Recognize(uint existing_id)
    {
        if (_currentID < existing_id)
            _currentID = existing_id;
    }

    public void Reset()
    {
        _currentID = 0;
    }
}