I don't know how it relates to DS directly but it certainly look promising turning events into enumerables...
.NET Rx team (this is not an official name) found that any push sequence (events, callbacks) can be viewed as a pull sequence (as we normally do while accessing enumerables) as well - or they are Dual in nature. In short observer/observable pattern is the dual of enumeration pattern.
http://amazedsaint.blogspot.com/2009/11/systemreactive-or-net-reactive.html