What is your custom exception hierrarchy?

Posted by bonefisher on Stack Overflow See other posts from Stack Overflow or by bonefisher
Published on 2010-04-29T11:54:44Z Indexed on 2010/04/29 11:57 UTC
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exception

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best-practices

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design

My question is: how would you create exception hierarchy in your application?

Designing the architecture of an application, from my perspective, we could have three types of exceptions:

the built-in (e.g.: InvalidOperationException)
custom internal system faults (DB transaction failed on commit, DbTransactionFailedException)
custom business exceptions (BusinessRuleViolationException)

Class hierarchy:

Exception
- MyAppInternalException
  - DbTransactionFailedException
  - MyServerTimeoutException
  - ...
- MyAppBusinessRuleViolationException
  - UsernameAlreadyExistsException
  - ...

where only MyAppInternalException & MyAppBusinessRuleViolationException would be catched.

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