Catch Exception, add data, and rethrow it

Question

I have the following code:

try {    OnInitialize(); } catch (PageObjectLifecycleException exception) {    exception.OldLifecycleState = CurrentLifecycleState;    exception.RequestedLifecycleState = LifecycleState.Initialized;    throw exception; } 

I catch an exception, add some more data to it, and rethrow it. Resharper warns me (correctly) that a rethrow is possibly intended and suggests changing it to:

throw; 

But I'm wondering: Will this correctly rethrow the modified exception or the unmodified original one?

Edit: In response to the "Try it and see" comments: I am new to C#, comming from C++. In C++ you often find undefined behaviour in corner cases like this and I am interested in whether what I want is really how it officially works.

Answer 1

You can add the extra information into data and re-throw the exception with throw so it maintains its original form and the callstack

try {    ... } catch (PageObjectLifecycleException exception) {    exception.Data.Add("additional data", "the additional data");    throw; }