typeof(Enum), null, PackingSize.Unspecified, 0, null);
_underlyingType = underlyingType;
_underlyingField = _tb.DefineField ("value__", underlyingType,
typeof(Enum), null, PackingSize.Unspecified, 0, null);
_underlyingType = underlyingType;
_underlyingField = _tb.DefineField ("value__", underlyingType,