public List <RentalGroup_Representation> GetAllRentalGroups()
{
using (ISQLConnection dataSource = DataSource)
{
List <RentalGroup_Representation> rtn = new List <RentalGroup_Representation>();
dataSource.GetAllRentalGroups().ForEach(rg => rtn.Add(RepresentationConverter.convertRentalGroup(rg)));
return(rtn);
}
}