private void AddDeletedEvent(SystemEntity obj)
{
if (Deleted.All(info => info.ObjectBase != obj))
{
EventInfo eventInfo = obj.GetEventInfo();
Deleted.Add(eventInfo);
eventInfo.PreTransactionHandled = true;
eventInfo.Publish(this, typeof(IOnDeleting <>),
(info, ses, t) => info.GetTypedInfo(t).ToDeletingArgs(ses, t));
}
}