Usage Example For Eventing https://github.com/DominicFinn/Eventing

Eventing.vb

public class Main
  private _bus as IEventBus

  public sub New(IEventBus bus)
    _bus = bus
  end sub 

  private Sub click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles menuSave.Click
    _bus.publish(new SomethingHappened() with { .Id = 1 })
  end sub
end class

public class SomethingHappened
  public readonly Id as integer

  public sub New(id as integer)
    me.Id = id
  end sub 
end class 

public class DoSomethingOnSomethingHappened
    Implements IEventHandler(Of SomethingHappened)

    sub handle(ByVal e As SomethingHappened) _
        Implements IEventHandler(Of SomethingHappened).Handle

        ' do something with the something happened event, save an entity, create a project, send an email

    End Sub
end class