In this stream, we talk about all about the Prism IEventAggregator. Luckily for us, we can reuse the slides from another training class I gave before. This means we can focus the majority of this stream on writing demos using the IEventAggregator. We learn how easy it is to send messages between decoupled assemblies (assemblies that have no reference to each other). We learn how to create events, publish events, subscribe to events, filter events, and lastly how to unsubscribe to events. This was a fun stream packed with code and explanations.