Newtonsoft / JSON.Net

This is a third party tool created by Newtonsoft.com

link - newtonsoft.com/json 
link - newtonsoft.com/json/help/html/JsonNetVsDotNetSerializers.htm 

The most used classes are:
JsonConvert
[JsonProperty]
JsonReader
JsonWriter
JsonSerializer.

using Newtonsoft.Json;  

SerializeObject

Creating JSON string in C#

    public class Student   
    {  
        public string name {  
            get;  
            set;  
        }  
    }  
    public class Universities {  
        public string university {  
            get;  
            set;  
        }  
        public System.Collections.Generic.IList < Student > students {  
            get;  
            set;  
        }  
    }  
    public class ClassUniversities {  
        public Universities universities {  
            get;  
            set;  
        }  
    }  
    class Program  
    {  
        static void Main(string[] args)   
        {  
            Class Universities university1 = new ClassUniversities();  
            university1.universities = new Universities();  
            university1.universities.university = "Warwick University";  
  
            System.Collections.Generic.List < Student > listStudent = newList < Student > ();  
            Student student1 = newStudent {  
                name = "First Name"  
            };  
            Student student2 = newStudent {  
                name = "Second Name"  
            };  
            Student student3 = newStudent {  
                name = "Third Name"  
            };  
            Student student4 = newStudent {  
                name = "Fourth Name"  
            };  
  
            listStudent.Add(student1);  
            listStudent.Add(student2);  
            listStudent.Add(student3);  
            listStudent.Add(student4);  
  
            university1.universities.students = listStudent;  
            stringjson = JsonConvert.SerializeObject(university1);  
  
            System.Console.WriteLine(json);  
            Console.ReadLine();  
        }  
    }  

DeserializeObject

Reading JSON from a website

class Program   
{   
      static void Main(string[] args)    
      {   
        string url = "http://bettersolutions.com/api/get_posts/";   

        HttpWebRequestrequest = WebRequest.Create(url) asHttpWebRequest;   
          string jsonValue = "";   
          using(HttpWebResponseresponse = request.GetResponse() asHttpWebResponse)   
          {   
             StreamReaderreader = newStreamReader(response.GetResponseStream());   
              jsonValue = reader.ReadToEnd();   
           }   
  
         ClassWebsitepostswebsitePosts = JsonConvert.DeserializeObject < ClassWebsiteposts > (jsonValue);   
     }   
}