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/56980584/list-not-updating-with-data-from-my-json-file

​

    public class Input

    {

        public DateTime? Signed { get; set; }

        public DateTime? Portal { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var json = GetJson();

            var settings = new JsonSerializerSettings

            {

                // Account for the custom DateTime format.

                DateFormatString = "dddd, MMMM d, yyyy @ h:mm:ss tt",

                // Do not re-serialize null `DateTime?` properties.

                NullValueHandling = NullValueHandling.Ignore,

                // Convert named c# properties -- but not dictionary keys -- to camel case

                ContractResolver = new DefaultContractResolver { NamingStrategy = new CamelCaseNamingStrategy() },

            };

            var inputs = JsonConvert.DeserializeObject<Dictionary<string, Input>>(json, settings);

​

            var outputJson = JsonConvert.SerializeObject(inputs, Formatting.Indented, settings);

            Console.WriteLine(inputs.Count);

            Assert.IsTrue(inputs.Count > 0);

            Console.WriteLine("Re-serialized inputs:");

            Console.WriteLine(outputJson);

        }   

        static string GetJson()

        {

            return @"{

  ""Schmidt, Wayne"": {

    ""signed"": ""Friday, June 14, 2019 @ 10:58:21 PM""

  },

  ""Hertel, Curtis"": {

    ""portal"": ""Wednesday, June 5, 2019 @ 10:30:36 AM""

  },

  ""Daley, Kevin"": {

    ""signed"": ""Tuesday, June 4, 2019 @ 4:07:17 PM""

  }

}";

        }

    }

​

    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;

            }

        }

    }

​