也是搬的，大家勿喷，贴出来只为了自己记忆查找

需要引用

System.Web.Extensions.dll 这个类库

命名空间:

System.Web.Script.Serialization

数据结构

public class Team
    {
        public string Name { get; set; }
        public List<User> Users { get; set; }
    } 
    public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }

 Class --> JSON

javaScriptSerializer js = new JavascriptSerializer();
            Team team = new Team()
            {
                Name = "梦之队",
                Users = new List<User>() { 
                 new User() { Id = 1, Name = "XXX" },
                  new User() { Id = 2, Name = "YYY" },
                   new User() { Id = 3, Name = "ZZZ" },
                }
            };
            string json = js.Serialize(team);
            Console.WriteLine(json);

Json --> Class

            string json = "{\"Name\":\"梦之队\",\"Users\":[{\"Id\":1,\"Name\":\"XXX\"},{\"Id\":2,\"Name\":\"YYY\"},{\"Id\":3,\"Name\":\"ZZZ\"}]}";
            JavaScriptSerializer js = new JavaScriptSerializer();
            Team team = js.Deserialize<Team>(json);

前台可以把一个数组转换成Json

需要引用json.js

 $.toJSON(data);