private SendFileCompleteEventArgs SendFileWorker(string FileName)
    {
      SendFileCompleteEventArgs result = null;
 
      using (FileStream fs = new FileStream(FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
      {
        using (TcpClient cli = new TcpClient())
        {
          cli.Connect(this.endPoint);
          result = new SendFileCompleteEventArgs(FileName);
          result.Started = DateTime.Now;
 
          using (NetworkStream ns = cli.GetStream())
          {
            StreamHelper.CopyStreamToStream(fs, ns, null);
            ns.Flush();
            ns.Close();
          }
          result.Completed = DateTime.Now;
          return result;
        }
      }
    }