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/64679585/c-sharp-deserialize-xml-while-ignoring-namespace

​

    public class Root

    {

        public SomeClass IWantThis { get; set; }

    }

​

    public class SomeClass

    {

        public string Value { get; set; }

    }

    public class TestClass

    {

        public static void Test()

        {

            foreach (var xml in GetXml())

            {

                using (var textReader = new StringReader(xml))

                {

                    var loadedSomeClassXml = XmlExtensions.GetObjectFromXml<SomeClass>(textReader, "IWantThis", "", true);

                    Assert.AreEqual("hello", loadedSomeClassXml?.Value);

                    Console.WriteLine("{0} deserialized successfully.", loadedSomeClassXml);

                }

            }

        }

        static IEnumerable<string> GetXml()

        {

            return new []

            {

                @"<Root xmlns=""ignoreThisNamespace"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">

  <IWantThis>

    <Value>hello</Value>

  </IWantThis>

</Root>",

                @"<a:Root xmlns:a=""ignoreThisNamespace"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">

  <a:IWantThis>

    <a:Value>hello</a:Value>

  </a:IWantThis>

</a:Root>",

            };

        }

    }

​

    public static partial class XmlExtensions

    {

        public static T GetObjectFromXml<T>(string path, string localName, string namespaceURI, bool ignoreNamespaces = false)

        {

            using (var textReader = new StreamReader(path))

                return GetObjectFromXml<T>(textReader, localName, namespaceURI);

        }

        public static T GetObjectFromXml<T>(TextReader textReader, string localName, string namespaceURI, bool ignoreNamespaces = false)

        {

            using (var xmlReader = ignoreNamespaces ? new NamespaceIgnorantXmlTextReader(textReader) : XmlReader.Create(textReader))

                return GetObjectFromXml<T>(xmlReader, localName, namespaceURI);

        }

        public static T GetObjectFromXml<T>(XmlReader reader, string localName, string namespaceURI)

        {

            while (reader.Read())

            {

                if (reader.NodeType == XmlNodeType.Element && reader.LocalName == "IWantThis" && reader.NamespaceURI == namespaceURI)

                {

                    var serializer = XmlSerializerFactory.Create(typeof(T), localName, namespaceURI);

                    using (var subReader = reader.ReadSubtree())

                        return (T)serializer.Deserialize(subReader);

                }

            }

            // Or throw an exception?

            return default(T);

        }

    }

​

    // This class copied from this answer https://stackoverflow.com/a/873281/3744182

    // To https://stackoverflow.com/questions/870293/can-i-make-xmlserializer-ignore-the-namespace-on-deserialization

    // By https://stackoverflow.com/users/48082/cheeso

    // helper class to ignore namespaces when de-serializing

    public class NamespaceIgnorantXmlTextReader : XmlTextReader

    {

        public NamespaceIgnorantXmlTextReader(System.IO.TextReader reader): base(reader) { }

​

        public override string NamespaceURI { get { return ""; } }

    }

​

    public static class XmlSerializerFactory

    {

        // To avoid a memory leak the serializer must be cached.

        // https://stackoverflow.com/questions/23897145/memory-leak-using-streamreader-and-xmlserializer

        // This factory taken from 

        // https://stackoverflow.com/questions/34128757/wrap-properties-with-cdata-section-xml-serialization-c-sharp/34138648#34138648

​

        readonly static Dictionary<Tuple<Type, string, string>, XmlSerializer> cache;

        readonly static object padlock;

​

        static XmlSerializerFactory()

        {

            padlock = new object();

            cache = new Dictionary<Tuple<Type, string, string>, XmlSerializer>();

        }

​

        public static XmlSerializer Create(Type serializedType, string rootName, string rootNamespace)

        {

            if (serializedType == null)

                throw new ArgumentNullException();

            if (rootName == null && rootNamespace == null)

                return new XmlSerializer(serializedType);

            lock (padlock)

            {

                XmlSerializer serializer;

                var key = Tuple.Create(serializedType, rootName, rootNamespace);

                if (!cache.TryGetValue(key, out serializer))

                {

                    cache[key] = serializer = new XmlSerializer(serializedType, new XmlRootAttribute { ElementName = rootName, Namespace = rootNamespace });

                }

                return serializer;

            }

        }

    }

​

    public class Program

    {

        public static void Main()

        {

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

            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;

        }

    }

​