Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.

This will occur due to Responce.Redirect() method.

Why we use false to the second argument in above method?
The second argument to Redirect is the boolean literal false, which indicates we do not want an exception to be thrown to terminate the page. If you do not pass false, an exception will occur and this can slow down websites and complicate error handling.

:)