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/56103920/parsing-json-of-two-float-arrays-into-two-lists-c-sharp

​

    public class RootObject

    {

        public List<double> lattitudes { get; set; }

        public List<double> longitudes { get; set; }

    }

​

    public class LatLong

    {

        public double Latitude { get; set; }

        public double Longitude { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var jsonString = GetJson();

            var root = JsonConvert.DeserializeObject<RootObject>(jsonString);

            var array = root.lattitudes

                .Zip(root.longitudes, (lat, @long) => new LatLong { Latitude = lat, Longitude = @long })

                .ToArray();

            Console.WriteLine(JsonConvert.SerializeObject(array, Formatting.Indented));

        }   

        static string GetJson()

        {

            return @"{

  ""lattitudes"": [

    48.75608,

    48.75608,

    48.75608,

    48.75608,

    48.75608,

],

  ""longitudes"": [

    48.75608,

    2.302038,

    48.75608,

    48.75608,

    48.75608,

  ]

}";

        }

    }

​

    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;

            }

        }

    }

​