//This requires Caliburn.Micro!

static class AggregatorProvider
    {
        public static EventAggregator Aggregator = new EventAggregator();
    }

//Now, in each class
public class SomeClass : IHandle<object>
//Main constructor for class add:
AggregatorProvider.Aggregator.Subscribe(this);

//then add this function:
public void Handle(object message) {
    //Do something with the object
        }

//Then to send
AggregatorProvider.Aggregator.Publish(someObject);