Keven, Thanks for prompt reply.

Here is the sample code snippet.

I am using SQLReport Server 2005 to get the data.

Byte[] results;
ReportExecutionService rsExec;
results = rsExec.Render(format, deviceInfo,
                       out extension, out encode,
                       out mimeType, out warnings, out streamIDs);

SavePDF(results, filename); // calling SavePDF method to save the
result array output in PDF form.

private bool SavePDF(Byte[] results, string fileName)
       {
           try
           {

               using (FileStream stream = File.OpenWrite(fileName))
               {
                   stream.Write(results, 0, results.Length);
                   stream.Close();
                   stream.Dispose();
               }

               return true;
           }
           catch(Exception ex)
           {
               throw;
           }
       }

Now,
1> If I get large stream from ReportExecutionService then how to split
it in chunks and create a pdf file(say pdf has something around 3000 /
5000 pages in it)

Thanks in Advance.
Manoj