Which C# pattern has better performance to avoid duplicated event handlers?

Question

There are basically two patterns in avoiding duplicated registering of event handlers: (According to this discussion: C# pattern to prevent an event handler hooked twice)

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Answer 1

MyEvent -= MyEventHandlerMethodfirst need to find the registered event handler in the invocation list in order to remove it. So GetInvocationList().Contains is better, but it's truely insignificant.

But, notice that you can't access event EventHandler foo's invocation list....