Connects the given selector to this event.
Disconnects the given selector from this event.
Registers a live observer with this event.
Registers a live observer with this event. The method is called with the
observing function which receives the event's update messages, and the
method generates an opaque Disposable instance, which may be used to
remove the observer eventually (through the dispose method).
Eventis not sealed in order to allow you define traits inheriting from it, while the concrete implementations should extend either ofEvent.ConstantorEvent.Node(which itself is sealed and split intoEvent.InvariantandEvent.Mutating.