C# Event Handlers

Question

How can I check in C# if button.Click event has any handlers associated? If (button.Click != null) throws compile error.

Answer 1

Why do you need this? What is the context? Maybe there's a better way to achieve the result
The button is an external object and what you're trying to do is check is its internal list of subscribers without asking it. It's violating encapsulation..
You should always let the object manage the subscribers for the events it exposes. If it wanted clients to be aware, it would have exposed a method HasClientsRegistered. Don't break in.