I'm trying to figure out how to implement an event in a ruby class. Specifically, I am trying to make my class implement an interface (INotifyPropertyChanged) that includes an event (PropertyChanged). I can create my add_PropertyChanged and remove_PropertyChanged methods... but then what?

This is what my class looks like so far:

class TestClass
    include System::ComponentModel::INotifyPropertyChanged

    def add_PropertyChanged(handler)
    end

    def remove_PropertyChanged(handler)
    end
end