to handle null or empty strings better
to handle null or empty strings better



Former-commit-id: bfad50f3ea7417ca0da1557f412705a3420409f9
MassTransit/MassTransit,SanSYS/MassTransit,SanSYS/MassTransit,phatboyg/MassTransit,jacobpovar/MassTransit,jacobpovar/MassTransit,phatboyg/MassTransit,MassTransit/MassTransit