How do I unsubscribe all handlers from an event for a particular class in C#?

Question

Basic premise:

I have a Room which publishes an event when an Avatar \"enters\" to all Avatars within the Room. When an Avatar leaves the Room I want it to remove a

Answer 1

Is there anything wrong with a standard remove?

public void RemovePlayer(Avatar theAvatar) {
 AvatarEntersRoom -= new EventHandler(theAvatar.HandleAvatarEntersRoom);

}

EDIT

Based on your update it appears that you want code that will remove a particular object from all events on a particular class. There is no realistic way to accomplish this goal. It's often a bit verbose but the best way is to individually add/remove a particular object method combo from every event.

The only way to get close to this functionality is to use reflection. You could reflectively grab all events on your class and then do some magic to find all instances of a class within the event chain. This will only be a partial solution though because it will ignore such things as a lambda expression event handlers.