NullReferenceException on instantiated object?

Question

This is a segment of code from an app I\'ve inherited, a user got a Yellow screen of death:

Object reference not set to an instance of an object

Answer 1

The NullReferenceException was actually thrown within a catch block so the stack trace couldn't display that line of code so instead it stopped at the caller.

It was indeed one of the properties of the l_Monitor instance.