c# windows phone Downloads folder

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C#5.0

VB12

Hi, according to http://msdn.microsoft.com/en-us/library/windows/apps/hh202959(v=vs.105).aspx[^]
i create a backgroundtransfer. i want when download is completed, that file moves to "Downloads Folder on root directory" (Phone or SD Card/Downloads). i don't know how can i make it, microsoft changes all codes on Windows Phone.

microsoft wrote a code on that topic>

case TransferStatus.Completed:

  // If the status code of a completed transfer is 200 or 206, the
  // transfer was successful
  if (transfer.StatusCode == 200 || transfer.StatusCode == 206)
  {
    // Remove the transfer request in order to make room in the
    // queue for more transfers. Transfers are not automatically
    // removed by the system.
    RemoveTransferRequest(transfer.RequestId);

    // In this example, the downloaded file is moved into the root
    // Isolated Storage directory
    using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
    {
      string filename = transfer.Tag;
      if (isoStore.FileExists(filename))
      {
        isoStore.DeleteFile(filename);
      }
      isoStore.MoveFile(transfer.DownloadLocation.OriginalString, filename);
    }
  }

but i dont know where goes that file when moved!

please give me a code. thanks alot