StringValue of NumberField is localized

The StringValue property of Lucene.Net.Documents.NumericField returns a localized string value (ie. confusion about the decimal separation character). IMHO it should be a following the invariant culture whenever possible.

Suggested fix:

public override string StringValue
{
get

{ if (fieldsData == null) return null; if (fieldsData is IConvertible) return ((IConvertible)fieldsData).ToString(CultureInfo.InvariantCulture); return fieldsData.ToString(); }

}