title: CQRS/EventStore : How to check if an aggregate exists?
body: <p>I am currently using J Oliver's EventStore and I want to know how I can check if an aggregate exists when I do my call (GetById(Guid id))?</p>
  <p>Following how CQRS works, should I be querying the read database or should I somehow find out if there is a corresponding aggregate in the EventStore?</p>