using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml.Serialization;

using System.Xml;

using System.IO;

using System.Diagnostics;

using System.Xml.Linq;

using System.Xml.Schema;

using System.Xml.XPath;

​

​

    public static class XmlSerializationHelper

    {

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

        {

            using (StringReader reader = new StringReader(xmlString))

            {

                return (T)new XmlSerializer(typeof(T)).Deserialize(reader);

            }

        }

​

        public static string GetXml<T>(this T obj)

        {

            using (var textWriter = new StringWriter())

            {

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

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

                    new XmlSerializer(obj.GetType()).Serialize(xmlWriter, obj);

                return textWriter.ToString();

            }

        }

    }

​

    public static class ConsoleAndDebug

    {

        public static void WriteLine(object s)

        {

            Console.WriteLine(s);

            Debug.WriteLine(s);

        }

    }

​

​

    [System.SerializableAttribute()]

    public class Foo

    {

        private string myField;

        private bool myFieldSerializes;

​

        //Parameterless construction for serializing purposes

        public Foo() { }

​

        public Foo(string myField, bool myFieldSerializes)

        {

            this.myField = myField;

            this.myFieldSerializes = myFieldSerializes;

        }

​

        [XmlElement(IsNullable = true)] // Emit a value even when null as long as MyFieldSpecified == true

        public string MyField

        {

            get { return this.myField; }

            set { this.myField = value; }

        }

​

        [System.Xml.Serialization.XmlIgnoreAttribute()]

        public bool MyFieldSpecified { get { return myFieldSerializes; } set { myFieldSerializes = value; } }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            var test1 = new Foo { MyField = "aa", MyFieldSpecified = true };

            var test2 = new Foo { MyField = "aa", MyFieldSpecified = false };

            var test3 = new Foo { MyFieldSpecified = true };

            var test4 = new Foo { MyFieldSpecified = false };

​

            var tests = new [] { test1, test2, test3, test4 };

            foreach (var test in tests)

            {

                var xml = test.GetXml();

                ConsoleAndDebug.WriteLine(xml);

                var testBack = xml.LoadFromXML<Foo>();

                if (test.MyFieldSpecified != testBack.MyFieldSpecified)

                    throw new InvalidOperationException("test.MyFieldSpecified != testBack.MyFieldSpecified");

                if (test.MyFieldSpecified && testBack.MyField != test.MyField)

                    throw new InvalidOperationException("test.MyFieldSpecified && testBack.MyField != test.MyField");                   

                if (!test.MyFieldSpecified && testBack.MyField != null)

                    throw new InvalidOperationException("!test.MyFieldSpecified && testBack.MyField != null");

            }

            ConsoleAndDebug.WriteLine("done");

        }

    }

    public class Program

    {

        public static void Main()

        {

            TestClass.Test();

        }

    }

​