Is there a difference between “throw” and “throw ex”?

Question

There are some posts that asks what the difference between those two are already.
(why do I have to even mention this...)

But my question is different in a way

Answer 1

No, this will cause the exception to have a different stack trace. Only using a throw without any exception object in the catch handler will leave the stack trace unchanged.

You may want to return a boolean from HandleException whether the exception shall be rethrown or not.