public bool MoveNext()
{
if (_index >= _map.Count)
{
return false;
}
if (++_index == 0)
{
_current = null;
}
else
{
_current = null;
}
return (_index < _map.Count);
}
void IEnumerator.Reset()
{
_index = -1;
_current = null;
}
void IEnumerator.Reset()
{
_index = -1;
_current = null;
}