Delegates & events · interview question

What does declaring a delegate member with the event keyword add over a public delegate field?

Multiple choiceMedium

Outside code can only subscribe (+=) or unsubscribe (-=). Only the declaring class can invoke or replace it.Events run handlers on a background thread.Events can only have one subscriber.Events automatically catch exceptions thrown by handlers.

Answer and explanation

Correct answer

A. Outside code can only subscribe (+=) or unsubscribe (-=). Only the declaring class can invoke or replace it.

Why

event is an encapsulation feature: it stops other classes from wiping the invocation list (= null) or raising the event themselves.

References

Microsoft Learn: Delegates (C# programming guide)

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What does declaring a delegate member with the event keyword add over a public delegate field?

Correct answer

Why

References

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