谁会记事本上的转到功能编写!小弟刚学,想自己编写个记事本,可被那卡住了!希望哪个大哥大姐快来帮帮忙!!先谢谢咯

                rtbtext.SelectionStart =txbRow.GetFirstCharIndexFromLine(int.Parse(txbRow.Text) - 1)  ;
                rtbtext.SelectionLength = 0;
                rtbtext.Focus();
                rtbtext.ScrollToCaret();