private static void WriteJsvErrorToResponse(this IHttpResponse response, string operationName, string errorMessage, Exception ex, int statusCode)
        {
            var sb = new StringBuilder();
            sb.Append("{");
            sb.Append("ResponseStatus:{");
            sb.AppendFormat("ErrorCode:{0},", ex.ToErrorCode().EncodeJsv());
            sb.AppendFormat("Message:{0},", ex.Message.EncodeJsv());
            if (EndpointHost.Config.DebugMode) sb.AppendFormat("StackTrace:{0}", ex.StackTrace.EncodeJsv());
            sb.Append("}");
            sb.Append("}");

            response.WriteErrorTextToResponse(sb, ContentType.Jsv, statusCode);
        }
        private static void WriteXmlErrorToResponse(this IHttpResponse response, string operationName, string errorMessage, Exception ex, int statusCode)
        {
            var sb = new StringBuilder();
            sb.AppendFormat("<{0}Response xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"{1}\">\n",
                operationName, EndpointHost.Config.DefaultOperationNamespace);
            sb.AppendLine("<ResponseStatus>");
            sb.AppendFormat("<ErrorCode>{0}</ErrorCode>\n", ex.ToErrorCode().EncodeXml());
            sb.AppendFormat("<Message>{0}</Message>\n", ex.Message.EncodeXml());
            if (EndpointHost.Config.DebugMode) sb.AppendFormat("<StackTrace>{0}</StackTrace>\n", ex.StackTrace.EncodeXml());
            sb.AppendLine("</ResponseStatus>");
            sb.AppendFormat("</{0}Response>", operationName);

            response.WriteErrorTextToResponse(sb, ContentType.Xml, statusCode);
        }
        private static void WriteJsonErrorToResponse(this IHttpResponse response, string operationName, string errorMessage, Exception ex, HttpStatusCode statusCode)
        {
            var sb = new StringBuilder();
            sb.AppendLine("{");
            sb.AppendLine("\"ResponseStatus\":{");
            sb.AppendFormat(" \"ErrorCode\":{0},\n", ex.ToErrorCode().EncodeJson());
            sb.AppendFormat(" \"Message\":{0},\n", ex.Message.EncodeJson());
            if (EndpointHost.Config.DebugMode) sb.AppendFormat(" \"StackTrace\":{0}\n", ex.StackTrace.EncodeJson());
            sb.AppendLine("}");
            sb.AppendLine("}");

            response.WriteErrorTextToResponse(sb, ContentType.Json, statusCode);
        }