private static void AddContentLengthHeader(RequestBuilder request, string contentLengthValue)
 {
     request.AddHeader("Content-Length", contentLengthValue);
 }
 private static void AddContentLengthHeader(RequestBuilder request, int contentLengthValue)
 {
     AddContentLengthHeader(request, contentLengthValue.ToString(CultureInfo.InvariantCulture));
 }