c# json操作

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json;

namespace ConsoleApplication1
{
    class Program
    {

        public class Product
        {
            public string name;
            public DateTime time;
            public float price;
            public string[] desc;
        }


        static void Main(string[] args)
        {
            Product product = new Product();
            product.name = "zk";
            product.time = new DateTime();
            product.price = 19f;
            product.desc = new string[] {"big", "medium", "small"};

            string output = JsonConvert.SerializeObject(product);

            Console.WriteLine(output);

            Product newProduct = JsonConvert.DeserializeObject<Product>(output);

            Console.WriteLine(newProduct.name);
        }
    }
}

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Bson;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Schema;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json.Utilities;

namespace ConsoleApplication1
{
    class Program
    {

        public class Product
        {
            public string name;
            public DateTime time;

            public override string ToString()
            {
                return string.Format("Name: {0}, Time: {1}", name, time);
            }
        }


        static void Main(string[] args)
        {
            Product product = new Product();
            product.name = "zzz";
            product.time = new DateTime();

            JsonSerializer serial = new JsonSerializer();

            using (StreamWriter sw = new StreamWriter(System.Environment.CurrentDirectory + "\\" + "json.txt"))
            {
                serial.Serialize(sw, product);
            }
        }
    }
}