FastColoredTextBoxNS.MultiSelectionCommand.Undo C# (CSharp) Method

        public override void Undo()
        {
            ts.CurrentTB.BeginUpdate();
            ts.CurrentTB.Selection.BeginUpdate();
            try
            {
                for (int i = commandsByRanges.Count - 1; i >= 0; i--)
                    commandsByRanges[i].Undo();
            }
            finally
            {
                ts.CurrentTB.Selection.EndUpdate();
                ts.CurrentTB.EndUpdate();
            }
            ts.CurrentTB.Selection = MainRange.Clone();
            foreach (var r in ranges)
                ts.CurrentTB.OnTextChanged(r);
            ts.CurrentTB.OnSelectionChanged();
            ts.CurrentTB.Selection.ColumnSelectionMode = false;
        }