The fastest way would probably be as follows:
Debug Menu -> Exceptions
Click on Common Language Runtime -> System -> System.ArgumentException.
Click on System.ArguementException and on the lower portion of the dialog
window select "when exception is thrown" break into de ***
In addition, while stopped on a breakpoint, select Debug -> Windows -> Call
Stack to view the call stack window. One or both of these methods should get
you close to where you need to be.