using System;

using System.Collections.Generic;

​

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

            string json = @"{

                   ""Students"":[

                      {

                         ""Name"":""Mr. X"",

                         ""Class"":""Ten"",

                         ""Roll"":5,

                         ""Subject"": {

                            ""Name"":""Math"",

                            ""Marks"":90

                         }

                      },

                      {

                         ""Name"" : ""Mr. Y"",

                         ""Class"":""Ten"",

                         ""Roll"":7,

                         ""Subject"": {

                            ""Name"":""Math"",

                            ""Marks"":80

                         }

                      }

                   ]

                }";

​

​

        Student_Collection students = new Student_Collection();

​

​

​

​

​

          var settings = new JsonSerializerSettings

            {

              NullValueHandling = NullValueHandling.Ignore,

              MissingMemberHandling = MissingMemberHandling.Ignore

            };

​

        // this the line where I am getting the error 

        students = JsonConvert.DeserializeObject<Student_Collection>(json, settings);

​

        foreach (var item in students.students)

        {

            Console.WriteLine("{0}", item.Name);

        }

​

    }

    public class Subject

    {

        public string Name { get; set; }

        public string Marks { get; set; }

    }

​

    public class Student

    {

        public string Name { get; set; }

        public string Class { get; set; }

        public string Roll { get; set; }

        public Subject Subject { get; set; }

    }

​

    public class Student_Collection

    {

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

    }   

}