You want to catch all exceptions except NullReferenceException and handle them differently. Which approach correctly implements this in C#?
hard🚀 Application Q15 of 15
C Sharp (C#) - Exception Handling
You want to catch all exceptions except NullReferenceException and handle them differently. Which approach correctly implements this in C#?
AUse a catch block for Exception and rethrow if NullReferenceException
BUse a single catch block for Exception and check exception type inside
CUse two catch blocks: one for NullReferenceException, one for Exception
DUse a catch block for NullReferenceException only
Step-by-Step Solution
Solution:
Step 1: Understand the requirement
We want to handle all exceptions except NullReferenceException differently, so we must detect and exclude it.
Step 2: Evaluate approaches
Use a catch block for Exception and rethrow if NullReferenceException uses a general catch for Exception, then rethrows if the exception is NullReferenceException, effectively excluding it from handling.
Final Answer:
Use a catch block for Exception and rethrow if NullReferenceException -> Option A
Quick Check:
Rethrow to exclude specific exceptions [OK]
Quick Trick:Rethrow specific exceptions inside general catch [OK]
Common Mistakes:
MISTAKES
Catching NullReferenceException first but not rethrowing
Handling all exceptions in one catch without rethrow
Using only NullReferenceException catch block
Master "Exception Handling" in C Sharp (C#)
9 interactive learning modes - each teaches the same concept differently
