public void OnBeforeObjectRegistration(ReadOnlyCollection <ObjectID> loadedObjectIDs)
{
ArgumentUtility.CheckNotNull("loadedObjectIDs", loadedObjectIDs);
// The ObjectsLoadingEvent is allowed to cancel; therefore, we execute it before indicating that we're starting to register objects.
// _eventSink.RaiseObjectsLoadingEvent (loadedObjectIDs);
_hierarchyManager.OnBeforeObjectRegistration(loadedObjectIDs);
try
{
_eventSink.RaiseObjectsLoadingEvent(loadedObjectIDs);
}
catch
{
_hierarchyManager.OnAfterObjectRegistration(loadedObjectIDs);
throw;
}
}