using System;

using System.Collections.Generic;

using System.Text;

using System.Linq;

using System.Xml.Serialization;

using System.Xml;

using System.Xml.Linq;

using System.IO;

using System.Data;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO.Compression;

using System.Reflection;

​

using NUnit.Framework; //NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/76077454/error-deserializing-xml-to-object-when-it-is-sometimes-encased-in-another-root

​

    [XmlRoot(ElementName="address")]

    public class Address {

        [XmlElement(ElementName="street")]

        public string Street { get; set; }

        [XmlElement(ElementName="city")]

        public string City { get; set; }

        [XmlElement(ElementName="state")]

        public string State { get; set; }

        [XmlElement(ElementName="zip")]

        public string Zip { get; set; }

    }

​

    [XmlRoot(ElementName="customer")]

    public class Customer {

        [XmlElement(ElementName="name")]

        public string Name { get; set; }

        [XmlElement(ElementName="address")]

        public List<Address> Address { get; set; }

        [XmlAttribute(AttributeName="id")]

        public string Id { get; set; }

    }

​

    [XmlRoot(ElementName="customers")]

    public class Customers {

        [XmlElement(ElementName="customer")]

        public Customer Customer { get; set; }

    }

​

//https://stackoverflow.com/questions/73127531/how-to-add-a-new-node-to-an-existing-xml-using-c-sharp

​

    public class TestClass

    {

        public static void Test()

        {

            using var textReader = new StringReader(GetXml());

            using var reader = XmlReader.Create(textReader);

            reader.ReadToFollowing("customers");

            var serializer = new XmlSerializer(typeof(Customers));

            var customer = (Customers)serializer.Deserialize(reader);

            customer.Dump();

        }

​

        static string GetXml() =>

"""

<?xml version="1.0" encoding="UTF-8"?>

<data>

   <customers>

      <customer id="55000">

         <name>Charter Group</name>

         <address>

            <street>100 Main</street>

            <city>Framingham</city>

            <state>MA</state>

            <zip>01701</zip>

         </address>

         <address>

            <street>720 Prospect</street>

            <city>Framingham</city>

            <state>MA</state>

            <zip>01701</zip>

         </address>

         <address>

            <street>120 Ridge</street>

            <state>MA</state>

            <zip>01760</zip>

         </address>

      </customer>

   </customers>

</data>

""";            

    }

​

    public static class XmlSerializationHelper

    {

        public static T LoadFromXml<T>(this string xmlString, XmlSerializer serial = null)

        {

            serial = serial ?? new XmlSerializer(typeof(T));

            using (var reader = new StringReader(xmlString))

            {

                return (T)serial.Deserialize(reader);

            }

        }

​

        public static string GetXml<T>(this T obj, bool omitStandardNamespaces)

        {

            return obj.GetXml(null, omitStandardNamespaces);

        }

        public static string GetXml<T>(this T obj, XmlSerializer serializer = null, bool omitStandardNamespaces = false)

        {

            XmlSerializerNamespaces ns = null;

            if (omitStandardNamespaces)

            {

                ns = new XmlSerializerNamespaces();

                ns.Add("", ""); // Disable the xmlns:xsi and xmlns:xsd lines.

            }           

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings() { Indent = true }; // For cosmetic purposes.

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                    (serializer ?? new XmlSerializer(obj.GetType())).Serialize(xmlWriter, obj, ns);

                return textWriter.ToString();

            }

        }

        public static string GetOuterXml(this XmlNode node, bool indent = true)

        {

            if (node == null)

                return null;

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings

                {

                    Indent = indent,

                    OmitXmlDeclaration = true,

                };

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                {

                    node.WriteTo(xmlWriter);

                }

                return textWriter.ToString();

            }

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}, {2})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​