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/56136560/json-net-c-sharp-deserialize-json-string-and-children-string

​

    public class ItemAttribute

    {

        public string AttibuteName { get; set; }

        public string AttributeValue { get; set; }

    }

​

    public class SalesLine

    {

        public string SONumber { get; set; }

        public int LineNum { get; set; }

        public string ItemId { get; set; }

        public List<ItemAttribute> ItemAttributes { get; set; }

    }

​

    public class Value

    {

        public string documentType { get; set; }

        public string SONumber { get; set; }

        [JsonConverter(typeof(EmbeddedLiteralConverter<List<SalesLine>>))]

        public List<SalesLine> SalesLines { get; set; }

    }

​

    public class RootObject

    {

        public List<Value> value { get; set; }

    }

​

    public class EmbeddedLiteralConverter<T> : JsonConverter

    {

        public override bool CanConvert(Type objectType)

        {

            return typeof(T).IsAssignableFrom(objectType);

        }

​

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            if (reader.TokenType == JsonToken.Null)

                return null;

            var contract = serializer.ContractResolver.ResolveContract(objectType);

            if (contract is JsonPrimitiveContract)

                throw new JsonSerializationException("Invalid type: " + objectType);

            if (existingValue == null)

                existingValue = contract.DefaultCreator();

            if (reader.TokenType == JsonToken.String)

            {

                var json = (string)JToken.Load(reader);

                using (var subReader = new JsonTextReader(new StringReader(json)))

                {

                    // By populating a pre-allocated instance we avoid an infinite recursion in EmbeddedLiteralConverter<T>.ReadJson()

                    // Re-use the existing serializer to preserve settings.

                    serializer.Populate(subReader, existingValue);

                }

            }

            else

            {

                serializer.Populate(reader, existingValue);

            }

            return existingValue;

        }

​

        public override bool CanWrite { get { return false; } }

​

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

        {

            throw new NotImplementedException();

        }

    }

    class TestClass

    {

        public static void Test()

        {

            TestConverter();

            ShowUnescapedJson();

        }   

​

        static void TestConverter()

        {

            var jsonString = GetJson();

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

            var json2 = JsonConvert.SerializeObject(root, Formatting.Indented);

            Console.WriteLine("\nDeserialized and re-serialized {0}", root);

            Console.WriteLine(json2);

        }

        public static void ShowUnescapedJson()

        {           

            Console.WriteLine("\nUnescaped JSON: ");

​

            var jsonString = GetJson();

            var json = JToken.Parse(jsonString);

            foreach(var token in json.SelectTokens("value[*].SalesLines").ToList())

            {

                token.Replace(JToken.Parse((string)token));

            }

​

            Console.WriteLine(json);

        }   

​

        static string GetJson()

        {

            var json = @"

{

   ""value"":[

      {

         ""documentType"":""Quote"",

         ""SONumber"":""S-QUO1001"",

         ""SalesLines"":""[{\""SONumber\"":\""S-QUO1001\"",\""LineNum\"":10000,\""ItemId\"":\""1936-S\"",\""ItemAttributes\"":[{\""AttibuteName\"":\""COLOR\"",\""AttributeValue\"":\""YELLOW\""},{\""AttibuteName\"":\""DEPTH\"",\""AttributeValue\"":\""100\""},{\""AttibuteName\"":\""WIDTH\"",\""AttributeValue\"":\""120\""},{\""AttibuteName\"":\""HEIGHT\"",\""AttributeValue\"":\""115\""},{\""AttibuteName\"":\""MATERIAL DESCRIPTION\"",\""AttributeValue\"":\""COTTON, WOOD LEGS\""},{\""AttibuteName\"":\""MODEL YEAR\"",\""AttributeValue\"":\""1940\""}]}]""

      }

   ]

}

​

";

            return json;

        }

    }

​

    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;

            }

        }

    }

​