download doc file from server in silverlight

Hi
I am Considering you have saved your doc file on DB in bytes format & if not then save your doc file in bytes to DB

Try this :
1. Call asyncronous method of WCF to get the bytes of a file
2. Write resulted bytes to file at Client Side , you can do something like this
private void btnDownload_Click (object sender, RoutedEventArgs e)
  {
  try
  {
  DownloadFile = new SaveFileDialog();
  DownloadFile.Filter = "All Files(*.*)|*.*"; 
 
  DownloadFile.ShowDialog();
  if (!string.IsNullOrEmpty(DownloadFile.SafeFileName))
  {
  proxy.DownloadFileAsync(orgfilename, DownloadFile.SafeFileName);
 
  }
  }
  catch (Exception ex)
  {
  }
  }
 
Download asyncronous calll to get the bytes of a file
void proxy_DownloadFileCompleted (object sender, ServiceReference1.DownloadImageCompletedEventArgs e)
  {
  try
  {
  if (e.Result.ToString() == "-200")
  {
 
  }
  else if (e.Result.ToString() != null)
  {
  file = Convert.FromBase64String(e.Result.ToString());
 
  if (DownloadFile.SafeFileName != null && !string.IsNullOrEmpty(DownloadFile.SafeFileName))
  {
  using (System.IO.Stream stream = DownloadFile.OpenFile())
  {
  stream.Write(file, 0, file.Length);
  stream.Close();
  }
 
  }
 
  }
  else if (e.Result.ToString() != null)
  {
 
  }
  }
  catch (Exception ex)
  {
  }
  }

Orignal Source of Discussion :
http://forums.silverlight.net/t/215750.aspx/1