Easy C# Question 48 of 215

What is the difference between throw and throw ex?

.NET / C# · Speak this in 60–90 seconds · Faridabad & Delhi NCR

StackLIFOlast in, first out

QueueFIFOfirst in, first out

throw keeps the original stack trace when rethrowing.

Why interviewers care about C#:

They want a clean

contrast on C#, 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.

Before you speak the answer, walk the interviewer through these steps:

1
throw keeps the original
stack trace when rethrowing.
2
throw ex resets it
and hides the real origin.
3
In catch blocks I
rethrow with bare throw unless I am wrapping intentionally.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“throw ex resets it and hides the real origin.”

Break into beats

throwexresetsitandhides

Speaking order

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Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

throw keeps the original stack trace when rethrowing. throw ex resets it and hides the real origin.