gtk-sharp0.0.0.0Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.Event handler.The event utilizes this delegate:Event data is passed via the parameter.To attach a to an event, add the RetrieveSurroundingHandler instance to the event. The methods referenced by the RetrieveSurroundingHandler instance are invoked whenever the event is raised, until the RetrieveSurroundingHandler is removed from the event.System.DelegateSystem.ICloneableSystem.Runtime.Serialization.ISerializableSystem.Void