Problem while setting page range in printing

if (txt_Browse.Text != "")
{
    streamToPrint = new StreamReader(txt_Browse.Text);
    if (range.Checked)
    {
        if (Startrange.Text != "" && Endrange.Text != "")
        {
            // PrintDialog PrintDialog1 = new PrintDialog();
            //PrintDialog1.user = true;
            printDocument.PrinterSettings.PrinterName = cmb_printername.Text;
 
            printDocument.PrinterSettings.FromPage = int.Parse(Startrange.Text);
            printDocument.PrinterSettings.ToPage = int.Parse(Endrange.Text);
            printDocument.DocumentName = txt_Browse.Text;
            printDocument.Print();
        }