Program.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JsonTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string jsonString = "{ \"cities\": \"hi\" }";
            var monopolyStreets = MonopolyStreetData.FromJson(jsonString);

            MonopolyStreetData monopolyStreetData = new MonopolyStreetData();
            Console.WriteLine(monopolyStreetData.Cities);
            Console.ReadKey();
        }

        public partial class MonopolyStreetData
        {
            [JsonProperty("cities")]
            public string Cities { get; set; }
        }

        public partial class MonopolyStreetData
        {
            public static MonopolyStreetData FromJson(string json) => JsonConvert.DeserializeObject<MonopolyStreetData>(json, Program.Converter.Settings);
        }

        internal static class Converter
        {
            public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
            {
                MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
                DateParseHandling = DateParseHandling.None,
                Converters =
            {
                new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
            },
            };
        }
    }
}