executeURL() private method

private executeURL ( ) : string
return string
        public void should_Return_Data_As_Valid_JSON_When_API_URL_Is_Passed_In()
        {
            string apiKey = ConfigurationManager.AppSettings["APIKey"];
            String url = "http://search.twitter.com/search.{1}?q=hello";
            APIReader apiReader = new APIReader(url, apiKey, APIReader.outputFormat.JSON);
            String result = apiReader.getFetchedResults();
            string json = apiReader.executeURL();
            JavaScriptSerializer ser = new JavaScriptSerializer();
            var valid = ser.Deserialize<object>(json);

            Assert.IsNotNull(valid);
        }
        public void should_Return_Exception_When_InvalidJSON()
        {
            string apiKey = ConfigurationManager.AppSettings["APIKey"];
            String url = "http://search.twitter.com/search.{1}?q=hello";
            APIReader apiReader = new APIReader(url, apiKey, APIReader.outputFormat.JSON);
            String result = apiReader.getFetchedResults();
            string json = apiReader.executeURL();
            json = json + "xxxxx";

            Assert.IsFalse(apiReader.IsValidJSON(json));
        }
        public void should_Fetch_Data_As_XML_When_API_URL_Is_Passed_In_Invalid()
        {
            string apiKey = ConfigurationManager.AppSettings["APIKey"];

            String url = "http://www.muzu.tv/api/browse?muzuid={0}&af=a&g=pop&format={1}";   //"http://search.twitter.com/search.{0}?q=hello";
            APIReader apiReader = new APIReader(url, apiKey, APIReader.outputFormat.XML);
            string expected = "http://www.muzu.tv/api/browse?muzuid=" + apiKey + "&af=a&g=pop&format=xml";
            String result = apiReader.getFetchedResults();
            string xml = apiReader.executeURL();
            xml = xml + "xxxx";
            Assert.AreEqual(expected, result);
            Assert.AreEqual(false, apiReader.IsValidXML(xml));
        }