json.net 解析json

string jsonText = "[{'a':'aaa','b':'bbb','c':'ccc'},{'a':'aaa2','b':'bbb2','c':'ccc2'}]";
            JArray ja = (JArray)JsonConvert.DeserializeObject(jsonText);
            JObject o = (JObject)ja[1];
            Console.WriteLine(o["a"]);
            Console.WriteLine(ja[1]["a"]);