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

CSharp · Console

/Program.cs

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;
			}
		}
	}