1using Newtonsoft.Json;
2
3var jsonString = JsonConvert.SerializeObject(obj);

1Newtonsoft.Json.JsonConvert.SerializeObject(new {foo = "bar"})

1using System;
2using System.Web.Script.Serialization;
3
4public class MyDate
5{
6    public int year;
7    public int month;
8    public int day;
9}
10
11public class Lad
12{
13    public string firstName;
14    public string lastName;
15    public MyDate dateOfBirth;
16}
17
18class Program
19{
20    static void Main()
21    {
22        var obj = new Lad
23        {
24            firstName = "Markoff",
25            lastName = "Chaney",
26            dateOfBirth = new MyDate
27            {
28                year = 1901,
29                month = 4,
30                day = 30
31            }
32        };
33        var json = new JavaScriptSerializer().Serialize(obj);
34        Console.WriteLine(json);
35    }
36}

1var resultCon = JsonConvert.DeserializeObject<Dictionary<string, string>>(jsonStr);
2
3//or
4string json = "{\"ID\": 1, \"Name\": \"Abdullah\"}";
5User user = JsonConvert.DeserializeObject<User>(json);
6/*
7public class User
8{
9    public int ID { get; set; }
10    public string Name { get; set; }
11}
12*/