StringSetFilter Class
When inheriting this class, define each valid string (values that can exist in database)
as public constant of that class, e.g.,
Namespace:
Suoranta.EnterpriseLib.Linq.FiltersAssembly: Suoranta.EnterpriseLib (in Suoranta.EnterpriseLib.dll)
Remarks
C#
public class InsectSpeciesFilter { public const string Bee = "species_bee"; ...

