When should I create my own custom exception class rather than using a one provided by .Net?
Which base exception class should I derive from and why?
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When should I create my own custom exception class rather than using a one provided by .Net?
Which base exception class should I derive from and why?
Why create your own exception?
You create your own exception so that when you throw them, you can have specific catches and hence differentiate them from system thrown (unhandled) exceptions.
What class should you derive it from?
Earlier, it was standard practice for custom exceptions to be derived from
ApplicationExceptionclass but over time, MS recommendations have changed encouraging developers to derive fromSystem.Exceptionitself rather thanApplicationException