Json.NET double tester - Program.cs

Program.cs

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

namespace ConsoleApp1
{
    class Program
    {
        private static bool Exit;

        static void Main(string[] args)
        {
            Console.WriteLine("Hi!");

            var t = Task.Run(TestDoubles);

            Console.ReadKey();

            Exit = true;

            t.Wait();
        }

        public static double NextDouble(
            Random random,
            double minValue,
            double maxValue)
        {
            return random.NextDouble() * (maxValue - minValue) + minValue;
        }

        private static Task TestDoubles()
        {
            Random random = new Random();

            while (!Exit)
            {
                int a = random.Next(0, int.MaxValue);
                int b = random.Next(0, int.MaxValue);
                bool negative = random.NextDouble() >= 0.5;

                string doubleText = ((negative) ? "-" : string.Empty) + a + "." + b;


                StringReader sr = new StringReader(doubleText);
                JsonTextReader reader = new JsonTextReader(sr);

                double? d = reader.ReadAsDouble();

                double expected = double.Parse(doubleText);

                if (d.Value != expected)
                {
                    File.AppendAllText("incorrect.txt", doubleText + Environment.NewLine);
                }
            }

            return Task.FromResult(true);
        }
    }
}