public UnitManager()
{
//// define aggregate paths
////AggregatePaths.Add((Unit u) => u.ConversionsIamTheSource);
IUnitOfWork uow = this.GetUnitOfWork();
this.Repo = uow.GetReadOnlyRepository<Unit>();
this.ConversionMethodRepo = uow.GetReadOnlyRepository<ConversionMethod>();
this.DimensionRepo = uow.GetReadOnlyRepository<Dimension>();
}