C# foreach json node function by Newtonsoft.Json

foreach-jsonnode

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    using Newtonsoft.Json;
    using Newtonsoft.Json.Linq;

    class Program
    {
        static void Main(string[] args)
        {
            string jsonstr =
                "{\"timestamp\":\"2016-04-08 11:21:25\",\"apiKey\":\"jdtest\",\"data\":{\"adultQuantity\":3,\"childQuantity\":0,\"babyQuantity\":0,\"segmentList\":[{\"departCityCode\":\"PNZ\",\"arriveCityCode\":\"SHA\",\"departDate\":\"2016-04-19\"}]},\"H\":\"value\",\"c\":null,\"v\":\"\",\"w\":\"null\"}";
            Dictionary<string, object> dict = new Dictionary<string, object>();

            JObject _jObject = JObject.Parse(jsonstr);

            string str = Fun(_jObject);
        }

        public static string Fun(JObject obj)
        {
            string result = null;

            foreach (var item in obj)
            {
                if (typeof(JObject) == item.Value.GetType())
                {
                    JObject child = (JObject)item.Value;
                    string tmp = Fun(child);
                    result += tmp;
                }
                else if (typeof(JArray) == item.Value.GetType())
                {
                    JArray _jarray = (JArray)item.Value;
                    foreach (var jitem in _jarray)
                    {
                        JObject jchild = (JObject)jitem;
                        string tmp = Fun(jchild);
                        result += tmp;
                    }
                }
                else
                {
                    if (!(item.Value != null && item.Value.ToString().Trim().Equals("")))
                    {
                        result += string.Format("{0}={1},", item.Key, item.Value);
                    }
                }
            }
            return result;
        }

        public static T JsonDeSerializerObj<T>(string json)
        {
            T t = JsonConvert.DeserializeObject<T>(json);
            return t;
        }
    }
}