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 System.Collections.ObjectModel;

​

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/59997900/how-to-efficiently-load-api-results-into-a-datatable

​

    public static class JsonExtensions

    {

        public static T DeserializeAnonymousType<T>(TextReader textReader, T anonymousTypeObject, JsonSerializerSettings settings = null)

        {

            return (T)JsonSerializer.CreateDefault(settings).Deserialize(textReader, typeof(T));

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            using (var streamReader = new StreamReader(new MemoryStream(Encoding.UTF8.GetBytes(GetJson()))))

            {

                var root = JsonExtensions.DeserializeAnonymousType(streamReader, 

                                                                   new { success = default(bool), list = default(DataTable) });

                if (root.success)

                {

                    var dt = root.list;

                    // return the table

                    Console.WriteLine("Deserialized {0}:", dt.GetType());

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

                }

                else

                {

                    // Handle failure

                }

            }

        }   

        static string GetJson()

        {

            var json = @"{

    ""success"": true,

    ""code"": 0,

    ""msg"": ""성공하였습니다."",

    ""list"": [

        {

            ""code"": ""ANT"",

            ""code_name"": ""소둔구분"",

            ""p_code"": """",

            ""p_code_name"": """",

            ""code_type"": 0,

            ""code_level"": 0,

            ""max_level"": 1,

            ""description"": ""GROP : 99  DETL : ANT  SUBS : 00"",

            ""create_user"": ""SYSTEM"",

            ""create_time"": ""2019-04-24T17:58:58.000+0000"",

            ""disable_yn"": ""Y""

        },

        {

            ""code"": ""2ANT"",

            ""code_name"": ""소둔구분"",

            ""p_code"": """",

            ""p_code_name"": """",

            ""code_type"": 0,

            ""code_level"": 0,

            ""max_level"": 1,

            ""description"": ""GROP : 99  DETL : ANT  SUBS : 00"",

            ""create_user"": ""SYSTEM"",

            ""create_time"": ""2019-04-24T17:58:58.000+0000"",

            ""disable_yn"": ""Y""

        },

        {

            ""code"": ""3ANT"",

            ""code_name"": ""소둔구분"",

            ""p_code"": """",

            ""p_code_name"": """",

            ""code_type"": 0,

            ""code_level"": 0,

            ""max_level"": 1,

            ""description"": ""GROP : 99  DETL : ANT  SUBS : 00"",

            ""create_user"": ""SYSTEM"",

            ""create_time"": ""2019-04-24T17:58:58.000+0000"",

            ""disable_yn"": ""Y""

        },

        ]

}

";

            return json;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

            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 static string GetNetCoreVersion()

        {

            //https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be

            //

            var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;

            var assemblyPath = assembly.CodeBase.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);

            int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");

            if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)

                return assemblyPath[netCoreAppIndex + 1];

            return null;

        }

    }

​