public virtual void Clear()
{
if (Model.IsTransactional && Model.CurrentTransaction == null)
{
throw new Exception("Operation out of transaction");
}
if (!OwningEntity.Activated)
{
Model.Activate(OwningEntity);
}
var oldItems = Internal.ToArray();
Action doAction = () =>
{
Internal.Clear();
NotifyCollectionChanged(NotifyCollectionChangedAction.Reset);
NotifyCountChanged();
};
if (!Model.IsTransactional)
{
doAction();
return;
}
Action undoAction = () =>
{
Internal.AddRange(oldItems);
NotifyCollectionChanged(NotifyCollectionChangedAction.Add, oldItems);
NotifyCountChanged();
};
Model.CurrentTransaction.DoReversibleAction(doAction, undoAction, OwningEntity, ChangeType.Modified, Property);
}
