title: Response.AddHeader("Content-Disposition") not opening file in IE6
body: <p>I'm using Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.HtmlEncode(FileName)); to pop a 'open/save file' dialog for the users, so that they can download an file on to their local machines.</p>
  
  <p>This is working good normally in IE7,But on IE6 the file is not opening when user click on the open button in 'open/save file' dialog. I gone through the net and found that
  Response.AddHeader("Content-Disposition", "inline; filename="+Server.HtmlEncode(FileName));
  should be provide to work that in IE6,and its works fine.. </p>
  
  <p>But the issue is most of the files that can open in browser opens on the page itself.. ie user on a mail page and click download an image file it opens there,, i need it to open in another window as in case of IE7 what can i do... other files that cannot open in bowser open with current application in system ie(word,excel etc)..</p>
  
  <p>please suggest a method to stick with same code for both IEs... The Code i used is here....</p>
  
  <pre><code>Response.AddHeader("Content-Disposition", "attachment; filename=" +FileName);
  Response.AddHeader("Content-Length", file.Length.ToString());
  Response.ContentType = ReturnExtension(file.Extension.ToLower());
  Response.TransmitFile(file.FullName);
  Response.End();
  
   private string ReturnExtension(string fileExtension)
      {
          switch (fileExtension)
          {
              case ".txt":
                  return "text/plain";
              case ".doc":
                  return "application/ms-word";
              case ".xls":
                  return "application/vnd.ms-excel";
              case ".gif":
                  return "image/gif";
              case ".jpg":
              case "jpeg":
                  return "image/jpeg";
              case ".bmp":
                  return "image/bmp";
              case ".wav":
                  return "audio/wav";
              case ".ppt":
                  return "application/mspowerpoint";
              case ".dwg":
                  return "image/vnd.dwg";
              default:
                  return "application/octet-stream";
          }
      }
  </code></pre>