Backspace hvordan?

Hvordan laver jeg  backspace i stregen nedenfor?
\b virker ikke???!

string strText = nrLbl.Text+" :\b  "+katalognrTxtBox.Text+"\n\n"+label4.Text+" :  "+beskrTextBox.Text+    "\n\n"+udgAarLbl.Text+" :  "+udgAarTextbox.Text+"\n\n"+prisLbl.Text+" :  "+
                    prisTextBox.Text+"\n\n"+antalLbl.Text+" :  "+antalTextBox.Text+"\n\n"+
                    brprLbl.Text+" :  "+bpTextbox.Text;
                myReader = new StringReader(strText);
                PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog();
                printPreviewDialog1.Document = this.ThePrintDocument ;
                printPreviewDialog1.FormBorderStyle = FormBorderStyle.Fixed3D ;
                printPreviewDialog1.ShowDialog();