private void OnNullFkeyParentBindingSourceCurrentItemChanged(object sender, System.EventArgs e) { _currentNullFkeyParent = uxNullFkeyParentBindingSource.Current as Entities.NullFkeyParent; if (_currentNullFkeyParent != null) { _currentNullFkeyParent.Validate(); } //_NullFkeyParent.Validate(); OnCurrentEntityChanged(); }