Protected Overridable Sub OnItemsSourceChanged( _
   ByVal oldValue As IEnumerable, _
   ByVal newValue As IEnumerable _
) 

Dim instance As ISItemsControl
Dim oldValue As IEnumerable
Dim newValue As IEnumerable
 
instance.OnItemsSourceChanged(oldValue, newValue)

protected virtual void OnItemsSourceChanged( 
   IEnumerable oldValue,
   IEnumerable newValue
)

protected procedure OnItemsSourceChanged( 
    oldValue: IEnumerable;
    newValue: IEnumerable
); virtual; 

protected function OnItemsSourceChanged( 
   oldValue : IEnumerable,
   newValue : IEnumerable
);

protected: virtual void OnItemsSourceChanged( 
   IEnumerable* oldValue,
   IEnumerable* newValue
) 

protected:
virtual void OnItemsSourceChanged( 
   IEnumerable^ oldValue,
   IEnumerable^ newValue
)