What is IExceptionFilter versus middleware?
PICTURE THIS: RAG CHATBOT
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Simple meaning
Exception filters run in MVC filter pipeline
WHY — Filters instead of guessing?
Why interviewers care about Filters:
They want a clean
contrast on Filters, not two memorised paragraphs.
Say what changes for
the developer, then one case where picking wrong hurts.
Stay structured
Name the idea, why it exists, then one short example.
Close cleanly
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Exception filters run in
MVC filter pipeline
- 2middleware catches earlier or
outside MVC.
- 3APIs often use exception
middleware for ProblemDetails.
- 4I pick one strategy
per app style.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Say this line
“APIs often use exception middleware for ProblemDetails.”
Break into beats
APIsoftenuseexceptionmiddlewarefor
Speaking order
2987408337471632900
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Exception filters run in MVC filter pipeline middleware catches earlier or outside MVC.