How wrong is it to create an event handler delegate with out the standard (Obj sender, EventArgs args) signature?

Question

I understand the benefits of using the standard MS event handler delegate signature as it allows you to easily expand on the information passed through the event with out breaki

Answer 1

Use the EventHandler generic delegates for your events and create a type derived from EventArgs to hold your event data. So in other words, always. It's something that you always know exactly how it works when you come across it because it's never done otherwise.

Edit:

Code analysis CA1003: Use generic event handler instances
Code analysis CA1009: Declare event handlers correctly