about print all image in folder

hi for all
how can print all image in folder by c#
i have this code for print one image look her
 protected void btnPrint_Click(object sender, EventArgs e)         {            PrintDocument pd = new PrintDocument();             pd.PrintPage += PrintPage;             pd.Print();         }         private void PrintPage(object o, PrintPageEventArgs e)         {                         string[] files = Directory.GetFiles("C:\\Testfolder");    & ...