Editor.MainWindow.UpdateCheckedList C# (CSharp) Method

        private void UpdateCheckedList(CheckedListBox list)
        {
            object wasSelected = list.SelectedItem;
             list.BeginUpdate();
             for (int i = 0; i < list.Items.Count; i++)
            list.SetItemChecked(i, ((Item)list.Items[i]).IsVisible);
             list.SelectedItem = wasSelected;
             list.EndUpdate();
        }