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;

​

    //https://stackoverflow.com/questions/49977144/c-sharp-xml-deserialization-of-1-xml-to-different-classes#comment87012845_49977144

​

    public class Project

    {

        // Name for your root element.  Replace as desired.

        public const string RootElementName = "Project";

        // Namespace for your project.  Replace as required.

        public const string RootElementNamespaceURI = "https://stackoverflow.com/questions/49977144";

​

        public string BaseProperty { get; set; }

    }

​

    public class ProjectCustomerA : Project

    {

        public string CustomerProperty { get; set; }

​

        public string ProjectCustomerAProperty { get; set; }

    }

​

    public class ProjectCustomerB : Project

    {

        public string CustomerProperty { get; set; }

​

        public string ProjectCustomerBProperty { get; set; }

    }

​

    public static partial class XmlSerializationHelper

    {

        public static T LoadFromXmlAsType<T>(this string xmlString)

        {

            return new StringReader(xmlString).LoadFromXmlAsType<T>();

        }

​

        public static T LoadFromXmlAsType<T>(this TextReader textReader)

        {

            using (var xmlReader = XmlReader.Create(textReader, new XmlReaderSettings { CloseInput = false }))

                return xmlReader.LoadFromXmlAsType<T>();

        }

​

        public static T LoadFromXmlAsType<T>(this XmlReader xmlReader)

        {

            while (xmlReader.NodeType != XmlNodeType.Element)

                if (!xmlReader.Read())

                    throw new XmlException("No root element");

            var serializer = XmlSerializerFactory.Create(typeof(T), xmlReader.LocalName, xmlReader.NamespaceURI);

            return (T)serializer.Deserialize(xmlReader);

        }

​

        public static string SaveToXmlAsType<T>(this T obj, string localName, string namespaceURI)

        {

            var sb = new StringBuilder();

            using (var writer = new StringWriter(sb))

                obj.SaveToXmlAsType(writer, localName, namespaceURI);

            return sb.ToString();

        }

​

        public static void SaveToXmlAsType<T>(this T obj, TextWriter textWriter, string localName, string namespaceURI)

        {

            using (var xmlWriter = XmlWriter.Create(textWriter, new XmlWriterSettings { CloseOutput = false, Indent = true }))

                obj.SaveToXmlAsType(xmlWriter, localName, namespaceURI);

        }

​

        public static void SaveToXmlAsType<T>(this T obj, XmlWriter xmlWriter, string localName, string namespaceURI)

        {

            var serializer = XmlSerializerFactory.Create(obj.GetType(), localName, namespaceURI);

            serializer.Serialize(xmlWriter, obj);

        }

    }

​

    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;

            }

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var roota = new ProjectCustomerA

            {

                BaseProperty = "base property value",

                CustomerProperty = "shared property value",

                ProjectCustomerAProperty = "project A value",

            };

            var xmla = roota.SaveToXmlAsType(Project.RootElementName, Project.RootElementNamespaceURI);

​

            var rootb = xmla.LoadFromXmlAsType<ProjectCustomerB>();

            var xmlb = rootb.SaveToXmlAsType(Project.RootElementName, Project.RootElementNamespaceURI);

            // Assert that the shared BaseProperty was deserialized successfully.

            Assert.IsTrue(roota.BaseProperty == rootb.BaseProperty);

            // Assert that the same-named CustomerProperty was ported over properly.

            Assert.IsTrue(roota.CustomerProperty == rootb.CustomerProperty);

            Console.WriteLine("\nXML for {0}:", roota);

            Console.WriteLine(xmla);

            Console.WriteLine("\nDeserialized and re-serialized XML for {0}:", rootb);

            Console.WriteLine(xmlb);

        }

    }

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Roslyn 2.0 Compiler; Environment version: " + Environment.Version);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Uncaught exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​