public Elements.ElementAddNotifyEventArgs( 
   object element
)

sheetView.DrawingContainer.ContainedObjects.ElementAddNotify += new Elements.ElementAddNotifyEventHandler(ContainedObjects_ElementAddNotify);
sheetView.DrawingContainer.ContainedObjects.ElementDeletingNotify += new Elements.ElementDeletingNotifyEventHandler(ContainedObjects_ElementDeletingNotify);