Why should events in C# take (sender, EventArgs)?

Question

It\'s known that you should declare events that take as parameters (object sender, EventArgs args). Why?

Answer 1

Actually this is debatable whether or not this is the best practice way to do events. There is the school of thought that as events are intended to decouple two segments of code, the fact that the event handler gets the sender, and has to know what type to cast the sender into in order to do anything with it is an anti-pattern.