Chapter 10

1. False; you can create as many abstract (required) or virtual (optional) extension points as long as the class is cohesive with a single responsibility.
2. Yes, there is no reason not to.
3. No, there is no greater limit than with any other code.
4. Yes, you can have one handler per message or multiple handlers per message. It is up to you and your requirements.
5. It helps divide responsibilities between classes.