Appcelerator.Dispatcher.getResponseHeader C# (CSharp) Method

        private string getResponseHeader(String content_type, String session_id)
        {
            double time = getTimeStamp();
            String xml_header = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
            xml_header += "<messages version='1.0' sessionid='" + session_id + "'>";

            /*
             JSON Response schema:
                      version: the version of the Appcelerator protocol
                      encoding: the text encoding of the message (generally UTF-8)
                      sessionid: (optional) the session id of the current session
                      time: the timestamp of this response in ISO 8601 format with timezone specified
                      messages: (an array of objects conforming to the message schema below
            */
            String json_header = "{version:'1.1',encoding:'UTF-8',sessionid:'" + session_id + "',timestamp:" + time + ",messages:[";
            String header = "";

            switch (content_type)
            {
                case ServiceBroker.APPLICATION_JSON:
                    header = json_header;
                    break;
                case ServiceBroker.XML_JSON:
                    header = xml_header;
                    break;
            }
            return header;
        }