using System;

using System.Linq;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string jsonString = @"{ 'contacts': [{ 'id': 'c200', 'name': 'Ravi Tamada', 'email': 'ravi@gmail.com', 'address': 'xx-xx-xxxx,x - street, x - country', 'gender': 'male', 'phone': { 'mobile': '+91 0000000000', 'home': '00 000000', 'office': '00 000000' } }] }";

        var contactList = JsonConvert.DeserializeObject<ContactList>(jsonString);

        var item = "c200";

        var temp = contactList.contacts.FirstOrDefault(x => x.id == item);

        Console.WriteLine(temp.name);

    }

}

   public class Phone 

   { 

      public string mobile { get; set; } 

      public string home { get; set; } 

      public string office { get; set; } 

   } 

​

   public class Contact 

   { 

      public string id { get; set; } 

      public string name { get; set; } 

      public string email { get; set; } 

      public string address { get; set; } 

      public string gender { get; set; } 

      public Phone phone { get; set; } 

   } 

​

   public class ContactList 

   { 

      public List<Contact> contacts { get; set; } 

   }