DataInfos.GetOrdinal(string) ignores field name mapping

[VadymMelnychuk]

This method should checks fieldNames also. It could be something like this:

    public int GetOrdinal(string name)
        {
            if (_fieldNames != null)
            {
                for (int i = 0; i < _fieldNames.Length; ++i)
                {
                    if (_fieldNames[i] == name)
                        return i;
                }
            }
            else
            {
                for (int i = 0; i < _properties.Length; ++i)
                {
                    if (_properties[i].Name == name)
                        return i;
                }
            }

            throw new IndexOutOfRangeException();
        }