using System;

using Newtonsoft;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var course = new Course

          {

              Title = "Biology 101",

              StartDate = DateTime.Parse("1/2/2011"),

              Students = new List<Student>

              {

                  new Student { Name = "John", Age = 14, EnrollmentDate = DateTime.Parse("2/1/2019") },

                  new Student { Name = "Mark", Age = 13, EnrollmentDate = DateTime.Parse("1/21/2019") },

              }

​

          };

        var sCourse = "{\"Title\":\"Biology 101\",\"StartDate\":\"2011-01-02T00:00:00\",\"Students\":[{\"Name\":\"John\",\"Age\":14,\"EnrollmentDate\":\"2019-02-01T00:00:00\"},{\"Name\":\"Mark\",\"Age\":13,\"EnrollmentDate\":\"2019-01-21T00:00:00\"}]}";

        // convert course to Json string

        // print to console

        // expected output:  {"Title":"Biology 101","StartDate":"2011-01-02T00:00:00","Students":[{"Name":"John","Age":14,"EnrollmentDate":"2019-02-01T00:00:00"},{"Name":"Mark","Age":13,"EnrollmentDate":"2019-01-21T00:00:00"}]}

        var json = Newtonsoft.Json.JsonConvert.SerializeObject(course);

        Console.WriteLine(json);

​

        // convert sCourse to course object

        // print course Title to console

        // expected output:  Biology 101

        var o = Newtonsoft.Json.JsonConvert.DeserializeObject<Course>(sCourse);

        Console.WriteLine(o.Title);

​

        // convert course to pretty Json string

        // print to console

        // expected otuput:

        /*

        {

          "Title": "Biology 101",

          "StartDate": "2011-01-02T00:00:00",

          "Students": [

            {

              "Name": "John",

              "Age": 14,

              "EnrollmentDate": "2019-02-01T00:00:00"

            },

            {

              "Name": "Mark",

              "Age": 13,

              "EnrollmentDate": "2019-01-21T00:00:00"

            }

          ]

        }

        */

​

        json = Newtonsoft.Json.JsonConvert.SerializeObject(course,Newtonsoft.Json.Formatting.Indented);

        Console.WriteLine(json);

    }

    class Student

    {

        public string Name { get; set; }

        public int Age { get; set; }

​

        public DateTime EnrollmentDate { get; set; }

​

    }

​

    class Course

    {

        public string Title { get; set; }

        public DateTime StartDate { get; set; }

​

        public List<Student> Students { get; set; }

    }

}

​