Printing pdf files with c#

try
                       {
                           streamToPrint = new StreamReader("file1" + rand.ToString() + ".txt");

                           try
                           {
                               printFont = new Font("Arial", 10);
                               PrintDocument pd = new PrintDocument();
                               pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
                               pd.Print();
                           }
                           finally
                           {
                               streamToPrint.Close();
                           }
                       }
                       catch (Exception ex)
                       {
                           MessageBox.Show(ex.Message);

private void pd_PrintPage(object sender, PrintPageEventArgs ev)
        {
            float linesPerPage = 0;
            float yPos = 0;
            int count = 0;
            float leftMargin = ev.MarginBounds.Left;
            float topMargin = ev.MarginBounds.Top;
            string line = null;

            // Calculate the number of lines per page.
            linesPerPage = ev.MarginBounds.Height /
               printFont.GetHeight(ev.Graphics);

            // Print each line of the file.
            while (count < linesPerPage &&
            ((line = streamToPrint.ReadLine()) != null))
            {
                yPos = topMargin + (count *
                   printFont.GetHeight(ev.Graphics));
                ev.Graphics.DrawString(line, printFont, Brushes.Black,
                   leftMargin, yPos, new StringFormat());
                count++;
            }

            // If more lines exist, print another page.
            if (line != null)
                ev.HasMorePages = true;
            else
                ev.HasMorePages = false;
        }
        private int RandomNumber(int min, int max)
        {
            Random random = new Random();
            return random.Next(min, max);
        }