What is middleware in ASP.NET Core?
PICTURE THIS: A REST CALL
Simple meaning
Middleware forms a pipeline that handles each HTTP request: logging, auth, routing, endpoints.
WHY — ASP.NET instead of guessing?
Why interviewers care about ASP.NET:
who only read docs from people who shipped.
and tied to .NET work.
Name the idea, why it exists, then one short example.
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:
- 1Middleware forms a pipeline
that handles each HTTP request: logging, auth, routing, endpoints.
- 2Order in Startup or
Program matters.
- 3Each piece can short-circuit
or call the next delegate.
- 4Give an example
One tiny concrete case you can say aloud.
- 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:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Middleware forms a pipeline that handles each HTTP request: logging, auth, routing, endpoints. Order in Startup or Program matters.