AcManager.Controls.AcObjectListBox.OnSelectedItemChanged C# (CSharp) Method

        private void OnSelectedItemChanged(AcObjectNew newValue) {
            if (InnerItemsSource == null) return;

            if (InnerItemsSource.CurrentItem != newValue) {
                InnerItemsSource.MoveCurrentToOrNull(newValue);
                UpdateSelected();
            }

            if (SelectionMode != SelectionMode.Single && _listBox != null) {
                _ignoreSelectionChange = true;
                _listBox.SelectedItems.Clear();
                _listBox.SelectedItems.Add(InnerItemsSource.CurrentItem);
                _ignoreSelectionChange = false;
            }
        }