Greetings, Is there a difference between using differen adapter data methods (like DeleteEntitiesDirectly, DeleteEntity and SaveEntity) using the same adapter object and inside a transaction; and doing the same operations using a UnitOfWork? Mainly, Does the unit-of-work do all its operations in one-go (one database trip) ?

The major benefit of the UnitOfWork is that you do not have to begin a transaction on the database and perform locks when the task may take a long time due to waiting for resources or user input.

Some more info on the internal details to append on Brian's answer: The UoW acts the same internally as if you're calling the methods by hand, it doesn't batch statements in 1 statement/roundtrip.