What is a delegate and how do events use it?
PICTURE THIS: HOW TO EXPLAIN IT
Simple meaning
A delegate is a type-safe function pointer.
WHY — Delegates instead of guessing?
Why interviewers care about Delegates:
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:
- 1A delegate is a
type-safe function pointer.
- 2An event is a
multicast delegate with add and remove so subscribers cannot wipe the invocation list.
- 3I use EventHandler or
a custom EventArgs type rather than exposing the delegate field.
- 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
A delegate is a type-safe function pointer. An event is a multicast delegate with add and remove so subscribers cannot wipe the invocation list.