How to download 10000+ files asynchronously to local using 4.0 .NET framework,

private bool WritetoDisk(ClientContext context, Microsoft.SharePoint.Client.File file, string ListName)
      {
          try
          {


              var sw = new Stopwatch();
              sw.Start();

              string Destination = @"c:\\temp";
              string destinationfolder = Destination + "/" + ListName;

              Stream fs = Microsoft.SharePoint.Client.File.OpenBinaryDirect(context, file.ServerRelativeUrl).Stream;

              byte[] binary = ReadFully(fs);


              if (!Directory.Exists(destinationfolder))
              {
                  Directory.CreateDirectory(destinationfolder);
              }

              FileStream stream = new FileStream(destinationfolder + "/" + file.Name, FileMode.Create);

              BinaryWriter writer = new BinaryWriter(stream);

              writer.Write(binary);

              writer.Close();
              sw.Stop();


          }
          catch (Exception e)
          {
          }
          return true;
      }