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

        public IEnumerable<AcObjectNew> GetSelectedItems() {
            if (SelectionMode == SelectionMode.Single) return new[] { SelectedItem };
            return _listBox?.SelectedItems.OfType<AcItemWrapper>().Select(x => x.Loaded()) ??
                    new AcObjectNew[0];
        }
    }