using System;

using System.Xml;

using System.Xml.Linq;

using System.IO;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Linq;

​

public class SingleArrayNodeXmlConverter : XmlNodeConverter

{

    public string ArrayElementName { get; set; }

​

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

    {

        var token = JObject.Load(reader);

        InjectArrayElements(token, ArrayElementName);

        var innerReader = token.CreateReader();

        innerReader.Read();

        return base.ReadJson(innerReader, objectType, existingValue, serializer);

    }

​

    private static void InjectArrayElements(JToken token, string elementName)

    {

        foreach (var childToken in token)

        {

            InjectArrayElements(childToken, elementName);

        }

​

        if (token.Type == JTokenType.Array)

        {

            var arrayHolder = new JObject{{elementName, token}};

            token.Replace(arrayHolder);

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        var xml = """

    <theroot>

    <root>

        <order>131as</order>

        <type>se134</type>

        <num>15643</num>

        <curr>USD</curr>

        <code>{"desc":"Testing123","city":"Dubai","auth":"author","store":[{"quantity":1,"amount":2.00},{"quantity":100,"amount":-8.33},{"quantity":300,"amount":-15.00}]}</code>

    </root>

    <root>

        <order>231as</order>

        <type>se134</type>

        <num>15643</num>

        <curr>AED</curr>

        <code>{"desc":"testdesc","city":"SHarjah","auth":"Mohammad","amount":20.00,"shop":"test","store":[{"quantity":1,"amount":10.00},{"quantity":100,"amount":98.33},{"quantity":300,"amount":-1.00}]}</code>

    </root>

    <root>

        <order>331as</order>

        <type>se134</type>

        <num>15643</num>

        <curr>SAR</curr>

        <code/>

    </root>

    <root>

        <order>431as</order>

        <type>se134</type>

        <num>15643</num>

        <curr>USD</curr>

        <code/>

    </root>

    <root>

        <order>531as</order>

        <type>Tse134</type>

        <num>15643</num>

        <curr>AED</curr>

        <code>{"desc":"testdesc","city":"Abudabhi","auth":"Mr.121","amount":10.00,"shop":"testa","store":[{"quantity":71,"amount":10.00},{"quantity":100,"amount":95.33},{"quantity":300,"amount":-8.00}]}</code>

    </root>

    </theroot>

    """;

        var doc = XDocument.Parse(xml);

        var converter = new SingleArrayNodeXmlConverter{DeserializeRootElementName = "root", WriteArrayAttribute = false, ArrayElementName = "element"};

        foreach (var code in doc.Descendants("code"))

        {

            if (string.IsNullOrWhiteSpace(code.Value))

                continue;

            var innerElements = (XmlNode)(XmlDocument)JsonConvert.DeserializeObject(code.Value, typeof(XmlDocument), converter);

            if (innerElements == null)

                continue;

            code.ReplaceAll(XDocument.Parse(innerElements.OuterXml).Root);

        //code.Add(X);

        }

​

        doc.ToString().Dump();

    }

}