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 Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

    //https://stackoverflow.com/questions/51703481/serializing-float-with-maximum-precision-without-changing-target-type

​

    public class RootObject

    {

        public float Value { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var bytes = new byte[] { 0xF9, 0xFF, 0x4F, 0xC1 }; // Big endian data

​

            Test(new byte[] { 0xF9, 0xFF, 0x4F, 0xC1 } /*0xF9FF4FC1*/ , null);

​

            Test(BitConverter.GetBytes(0.0f), null);    

​

            Test(BitConverter.GetBytes(-0.0f), null);   

        }

​

        public static void Test(byte[] bytes, JsonSerializerSettings settings)

        {

            Console.WriteLine("\nInput bytes: {0}.", string.Join(",", bytes.Select(b => "0x" + b.ToString("X"))));

            float myFloat = BitConverter.ToSingle(bytes, 0);

​

            Console.WriteLine("Input float: {0}.", myFloat.ToString("R"));

​

            var root = new RootObject { Value = myFloat };

​

            var json = JsonConvert.SerializeObject(root, settings);

​

            Console.WriteLine(json);

​

            var root2 = JsonConvert.DeserializeObject<RootObject>(json, settings);

​

            Console.WriteLine("Deserialized float: {0}.", root2.Value.ToString("R"));

​

            Assert.IsTrue(root.Value == root2.Value, "root.Value == root2.Value");

​

            var bytes2 = BitConverter.GetBytes(root2.Value);

​

            Assert.IsTrue(bytes.SequenceEqual(bytes2), "bytes.SequenceEqual(bytes2)");

            Console.WriteLine("Initial and round-tripped float values are identical.");

        }

    }

​

    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;

            }

        }

    }

​

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​