添加引用，Newtonsoft.Json.dll ，using Newtonsoft.Json.Linq;



//字符串转json
public static void strJson()
{
string jsonText = "{"shenzheng":"深圳","beijing":"北京","shanghai":[{"zj1":"zj11","zj2":"zj22"},"zjs"]}";

JObject jo = (JObject)JsonConvert.DeserializeObject(jsonText);//或者JObject jo = JObject.Parse(jsonText);
string zone = jo["shenzheng"].ToString();//输出 "深圳"
string zone_en = jo["shanghai"].ToString();//输出 "[{"zj1":"zj11","zj2":"zj22"},"zjs"]"
string zj1 = jo["shanghai"][1].ToString();//输出 "zjs"
Console.WriteLine(jo);
}


　　



//对象与数组转JSON
    public static void GetJsonString()
    {
        //初始化对象
        Obj product = new Obj() { Name = "苹果", Price = 5.5 };
        //序列化
        string o = new JavaScriptSerializer().Serialize(product);//值："{\"Name\":\"苹果\",\"Price\":5.5}"

        //数组转json
        List<Obj> products = new List<Obj>(){
        new Obj(){Name="苹果",Price=5.5},
        new Obj(){Name="橘子",Price=2.5},
        new Obj(){Name="干柿子",Price=16.00}
        };

        ProductList productlist = new ProductList();
        productlist.GetProducts = products;
        //序列化
        string os = new JavaScriptSerializer().Serialize(productlist);
        //输出 "{\"GetProducts\":[{\"Name\":\"苹果\",\"Price\":5.5},{\"Name\":\"橘子\",\"Price\":2.5},{\"Name\":\"干柿子\",\"Price\":16}]}"
    }

    //json转对象、数组, 反序列化
    public static void JSONStringToList()
    {

        //json格式字符串
        string JsonStr = "{Name:'苹果',Price:5.5}";
        JavaScriptSerializer Serializer = new JavaScriptSerializer();

        //json字符串转为对象, 反序列化
        Obj obj = Serializer.Deserialize<Obj>(JsonStr);
            Console.Write(obj.Name + ":" + obj.Price + "\r\n");

        //json格式字符串
        string JsonStrs = "[{Name:'苹果',Price:5.5},{Name:'橘子',Price:2.5},{Name:'柿子',Price:16}]";

        JavaScriptSerializer Serializers = new JavaScriptSerializer();

        //json字符串转为数组对象, 反序列化
        List<Obj> objs = Serializers.Deserialize<List<Obj>>(JsonStrs);

        foreach (var item in objs)
        {
           Console.Write(item.Name + ":" + item.Price + "\r\n");
        }
    }