1.根据需要创建class
json数据结构：
{“name”:“张三”,“age”:20,“idCard”:“123456789”,“birthday”:“2021-01-01 00:00:00”,“hobbys”:[{“sort”:1,“desc”":“写字”},{“sort”:2,“desc”:“游泳”}]}
private class Studet
{
public string name { get; set; }
public int age { get; set; }
public string idCard { get; set; }
public DateTime birthday { get; set; }
public List hobbys { get; set; }
}
private class hobby
{
public int sort { get; set; }
public string desc { get; set; }

    }

2.应用dll文件Newtonsoft.Json
添加命名空间
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
需要用到里面的json方法
创建数组并将实例添加进去
//定义数组并将值添加到数组中
List hobby = new List();
hobby.Add(new hobby { sort = 1, desc = “写字” });
hobby.Add(new hobby { sort = 2, desc = “游泳” });
创建对象添加实例
JObject jsoure = new JObject();
jsoure.Add(“name”,“张三”);
jsoure.Add(“age”,20);
jsoure.Add(“idCard”,“123456788”);
jsoure.Add(“birthday”,“2021-01-01 12:34:23”);
jsoure.Add(“hobbys”, JToken.FromObject(hobby));
实例化：

        Studet student = JsonConvert.DeserializeObject<Studet>(jsoure.ToString());//将jobject转换为string类型
        //输出:张三
        Console.WriteLine(student.age);
        Console.Write(student.birthday);
        Console.ReadLine();
        for (int i = 0; i <= student.hobbys.Count; i++)
        {
            Console.WriteLine(student.hobbys[i].sort);
            Console.WriteLine(student.hobbys[i].desc);

        }

效果图：

参考的博客文章：
https://blog.csdn.net/weixin_43151418/article/details/127409818?utm_medium=distribute.pc_relevant.none-task-blog-2_defaultbaidujs_baidulandingword~default-0-127409818-blog-123168592.pc_relevant_recovery_v2&spm=1001.2101.3001.4242.1&utm_relevant_index=3