How to silent print the PDF document in the ASP.NET Classic by using Service?

//Create an instance of PdfDocumentView.
PdfDocumentView view = new PdfDocumentView();
//Load the document in the viewer as stream.
view.Load(new MemoryStream(filestreamarray));
//Silently print the document through the default printer.
view.PrintDocument.Print();

//Create an object reference for the Serviceclient.
var client = new ServiceReference1.Service1Client("BasicHttpBinding_Service1");
if (System.IO.Path.GetExtension(FileUpload1.PostedFile.FileName).Equals(".pdf"))
{
    //Get the stream of the file uploaded.
    Stream fileStream = FileUpload1.PostedFile.InputStream as Stream;
    MemoryStream memoryStream = new MemoryStream();
    fileStream.CopyTo(memoryStream);
    byte[] byteArray = memoryStream.ToArray();
    //Call the PrintService method in the service with filestream array as the parameter.
    client.PrintService(byteArray);
}