lw_common.ui.note_ctrl.find_cur_line_id C# (CSharp) Method

        private string find_cur_line_id() {
            // the last line - is always the last
            Debug.Assert(lines_.Count >= 2);
            foreach ( var l in lines_)
                if (l.Key != cur_line_id_ && l.Value == cur_line)
                    return l.Key;
            // we could not find it!
            Debug.Assert(false);
            return cur_line_id_;
        }