When I single step through the code below, it sends back the PDF file that
is retrieved in the line fm.GetAccountPDF(...).  When I run without single
stepping, I get the master page for this page.  I have actually saved the
file returned by IE 7 as a text file and opened it in notepad, so I have
confirmed that it is indeed the page master being returned.  The code is in
the code behind file for the aspx page and is called directly from a link on
the page.  In all cases, the PDF file is correctly created on the server and
I can open it directly from Windows Explorer.  This code is actually
slightly modified from the code in MS TechNet article 812406
http://support.microsoft.com/kb/812406/en-us.

What am I doing wrong?

Thanks,
Mike Ober.

protected void StreamFile(object sender, EventArgs e)
{
 const int ChunkSize = 8192; // Use a cluster size multiple for performance
 FileManager fm = null;
 System.IO.Stream iStream = null;
 try {
   fm = new FileManager((ASPNET2VAX.Core)Session["vax"]);
   try {
     System.IO.FileInfo fiPDF =
fm.GetAccountPDF(Request.QueryString["id"]);
     // Total bytes to read:
     long dataToRead = fiPDF.Length;
     Response.Clear();
     Response.AppendHeader("Content-Disposition", "attachment; filename=" +
fiPDF.Name);
     Response.AppendHeader("Content-Length", dataToRead.ToString());
     Response.ContentType =
ASPNET2VAX.SupportRoutines.LookupMIMEType(fiPDF);
     // Now write the file
     // Buffer to read sytes in chunks:
     byte[] buffer;
     // Length of the file:
     int length;
     // Open the file.
     iStream = new System.IO.FileStream(fiPDF.FullName,
                                                              System.IO.FileMode.Open,
                                                              System.IO.FileAccess.Read,
                                                              System.IO.FileShare.Read);
     // Read the bytes.
     while (dataToRead > 0) {
       // Verify that the client is connected.
       if (Response.IsClientConnected) {
         // Read the data in buffer.
         buffer = new byte[ChunkSize];
         length = iStream.Read(buffer, 0, ChunkSize);
         // Write the data to the current output stream.
         Response.OutputStream.Write(buffer, 0, length);
         // Flush the data to the HTML output.
         Response.Flush();
         // Update our position
         dataToRead = dataToRead - length;
       } else {
         //prevent infinite loop if user disconnects
         dataToRead = -1;
       }
     }
     Response.End();

   } catch (Exception ex) {
     hgc_outputMsg.InnerHtml += ex.Message;

   } finally {
     if (iStream != null) {
       iStream.Close();
     }
   }

 } catch {
   Response.Redirect(SingularityLibrary.config.CoreConfiguration.appPath(Request).ToString()
+ "/" + Wakefield.Core.Config.WakefieldConfig.ClientLoginPage);
 }
}