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/59484053/why-does-xmlserializer-fail-to-serialize-enum-value-in-net-core-but-works-fine

​

    public enum MyEnum

    {

        One,

    }

​

    public class ValueContainer

    {

        public object Value;

    }

​

    public class TestClass

    {

        public static void Test()

        {

            Console.WriteLine("{0}.{1}: Type.GetTypeCode={2}, Int32 XML={3}", 

                              typeof(MyEnum),

                              MyEnum.One, 

                              Type.GetTypeCode(MyEnum.One.GetType()), 

                              XmlConvert.ToString((int)MyEnum.One));

            Console.WriteLine();

            Console.WriteLine(new ValueContainer { Value = MyEnum.One }.GetXml());

        }

    }

​

    public class SomeOtherClass { }

​

    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, 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, OmitXmlDeclaration = true }; // For cosmetic purposes.

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

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

                return textWriter.ToString();

            }

        }       

    }

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("XmlSerializer version: {0}.", typeof(XmlSerializer).Assembly.FullName);          

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​