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You want to catch exceptions only if their message contains the word "critical" and log them. Which code snippet correctly uses a when clause to do this?

hard🚀 Application Q8 of Q15

C Sharp (C#) - Exception Handling

You want to catch exceptions only if their message contains the word "critical" and log them. Which code snippet correctly uses a when clause to do this?

Acatch (Exception ex) when (ex.Message.Contains("critical")) { Log(ex); }

Bcatch (Exception ex) if (ex.Message.Contains("critical")) { Log(ex); }

Ccatch (Exception ex) { if (ex.Message.Contains("critical")) Log(ex); }

Dcatch (Exception ex) when { ex.Message.Contains("critical"); Log(ex); }

Step-by-Step Solution

Solution:

Step 1: Identify correct when clause usage
The when clause must have a boolean expression after it to filter exceptions.
Step 2: Check each option
catch (Exception ex) when (ex.Message.Contains("critical")) { Log(ex); } correctly uses when (ex.Message.Contains("critical")). catch (Exception ex) if (ex.Message.Contains("critical")) { Log(ex); } uses invalid syntax with if. catch (Exception ex) { if (ex.Message.Contains("critical")) Log(ex); } uses if inside catch, not when. catch (Exception ex) when { ex.Message.Contains("critical"); Log(ex); } has invalid when syntax.
Final Answer:
catch (Exception ex) when (ex.Message.Contains("critical")) { Log(ex); } -> Option A
Quick Check:
when clause filters exceptions by condition [OK]

Quick Trick: Use when with boolean condition to filter exceptions [OK]

Common Mistakes:

MISTAKES

Using if instead of when in catch
Putting when block inside catch braces
Omitting condition after when

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