using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/53636516/parse-json-without-declaring-model-class/53636937#53636937

​

    public class Timeslot

    {

        public string room_id { get; set; }

        public string room_name { get; set; }

        public string booking_label { get; set; }

        public DateTime booking_start { get; set; }

        public DateTime booking_end { get; set; }

        public DateTime booking_created { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var jsonResult = GetJson();

            var reservations = Newtonsoft.Json.JsonConvert.DeserializeAnonymousType(jsonResult, 

                    new { bookings = 

                        new { group_id = default(string), name = default(string), url=default(string), 

                             timeslots = default(List<Timeslot>) } });          

            Console.WriteLine("Populated reservations: ");

            Console.WriteLine(JsonConvert.SerializeObject(reservations, Formatting.Indented));

            Assert.IsTrue(reservations.bookings.group_id == (string)JToken.Parse(jsonResult).SelectToken("bookings.group_id"));

            Assert.IsTrue(reservations.bookings.name == (string)JToken.Parse(jsonResult).SelectToken("bookings.name"));

            Assert.IsTrue(reservations.bookings.url == (string)JToken.Parse(jsonResult).SelectToken("bookings.url"));

            Assert.IsTrue(reservations.bookings.timeslots.Count == JToken.Parse(jsonResult).SelectTokens("bookings.timeslots[*]").Count());

        }   

        static string GetJson()

        {

            var json = @"{

""bookings"": {

    ""group_id"": 123,

    ""name"": ""Study Rooms"",

    ""url"": ""My URL"",

    ""timeslots"": [{

            // FIXED room_id changed to a string

            ""room_id"": ""0001"",

            ""room_name"": ""101"",

            ""booking_label"": ""Student 1"",

            ""booking_start"": ""2018-11-30T07:00:00-06:00"",

            ""booking_end"": ""2018-11-30T07:30:00-06:00"",

            ""booking_created"": ""2018-11-28T11:32:32-06:00""

        }, {

            ""room_id"": ""0002"",

            ""room_name"": ""102"",

            ""booking_label"": ""Student 2"",

            ""booking_start"": ""2018-11-30T07:30:00-06:00"",

            ""booking_end"": ""2018-11-30T08:00:00-06:00"",

            ""booking_created"": ""2018-11-28T11:32:32-06:00""

        }, //##AND many more like this##

    ]

}

}

";

            return json;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​