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

        private void toggle_del_note(string note_id) {
            var toggle_note = notes_sorted_by_line_index_.FirstOrDefault(x => x.note_id == note_id);
            if (toggle_note == null) {
                Debug.Assert(false);
                return;
            }

            dirty_ = true;

            string line_id = notes_sorted_by_line_index_.First(x => x.note_id == note_id).line_id;
            int same_line_count = notes_sorted_by_line_index_.Count(x => x.line_id == line_id);
            // at least the line + a note on that line
            Debug.Assert(same_line_count >= 2); 
            bool is_single = same_line_count <= 2;
            if (is_single) {
                // in this case - either pressed on the Note itself, or on the header -> should still delete both lines
                foreach (var n in notes_sorted_by_line_index_)
                    if (n.line_id == line_id)
                        n.deleted = !n.deleted;
            }
            else {
                // in this case, pressed on a line header - toggle all its sub-children
                bool deleted = !toggle_note.deleted;
                toggle_note.deleted = deleted;
                foreach (var n in toggle_note.descendants())
                    n.deleted = deleted;
            }

            readd_everything();
        }