Contentful Entry Model Class

namespace cfclt
{
    using System;
    using System.Collections.Generic;
    using System.Net.Http;

    using Contentful.Core;
    using Contentful.Core.Configuration;
    using Contentful.Core.Models;

    class Program
    {
        public class FieldTypesEntry
        {
            public double? NumberField { get; set; }
            public string StringField { get; set; }
            public Document RichTextField { get; set; }
            public List<Asset> AssetField { get; set; }
            public DateTime DateTimeField { get; set; }

            public void Render()
            {
                Console.WriteLine(GetType());
                Console.WriteLine("NumberField: " + NumberField);
                Console.WriteLine("StringField: " + StringField);
                Console.WriteLine("DateTimeField: " + DateTimeField);
                Console.WriteLine("RichTextField: " +
                                  new HtmlRenderer().ToHtml(RichTextField).GetAwaiter().GetResult());

                foreach (Asset assetField in AssetField)
                {
                    Console.WriteLine("AssetField: " + assetField.File.Url);
                }
            }
        }

        static void Main(string[] args)
        {
            HttpClient httpClient = new HttpClient();
            ContentfulOptions options = new ContentfulOptions
            {
                DeliveryApiKey = "Gg3vpa21vheFi28wzcPT7LDy3CgOEb0VJ62cGiPi0JQ",
                PreviewApiKey = "aVrO8Fhmoq-hNEDa78_QHkeqKIxgG6-JhofdnNpCj00",
                SpaceId = "qjiunow8a0ig"
            };

            ContentfulClient client = new ContentfulClient(httpClient, options);
            client.GetEntry<FieldTypesEntry>("7gRkxpacpEf7yLjL1ukb4G").GetAwaiter().GetResult().Render();
        }
    }
}