Naming C# events and handlers properly [closed]

Answer 1

Almost

The method to fire the event - OnEvent (from RaiseSomethingHasHappened)

i.e. OnBeforeOpen, OnClosing, OnSomethigHasHappened

The event Event (from OnSomethingHasHappened)

i.e. BeforeOpen, Closing, SomethingHasHappened

the handler <_> (from Car_SomethingHasHappened)

i.e. Form_BeforeOpen, Window_Closing, Car_SomethingHasHappened -> perfect