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.Collections.ObjectModel;

using System.Threading;

using System.ComponentModel;

using System.Xml.Linq;

using System.Reflection;

using System.Data;

using System.Xml.Schema;

using System.Text.RegularExpressions;

using System.Net;

using System.Xml.XPath;

using System.Globalization;

using System.ComponentModel.DataAnnotations;

using System.Collections;

​

​

    [Serializable()]

    public class Transaction

    {

        [XmlElement("RetailStoreID")]

        public string RetailStoreID { get; set; }

        [XmlElement("SequenceNumber")]

        public string SequenceNumber { get; set; }

    }

#if false

    [Serializable()]

    [XmlRoot("POSLog")]

    public class POSLog

    {

        [XmlArray("POSLog")]

        [XmlArrayItem("Transaction", typeof(Transaction))]

        public Transaction[] Transaction { get; set; }

    }

#else

    [Serializable()]

    [XmlRoot("POSLog")]

    public class POSLog

    {

        [XmlElement("Transaction")]

        public Transaction[] Transaction { get; set; }

    }   

#endif

    public class Program

    {

        static string GetXml()

        {

            var xml = @"<?xml version=""1.0"" encoding=""utf-8""?>

    <POSLog>

    <Transaction>

      <RetailStoreID>1</RetailStoreID>

      <SequenceNumber>2</SequenceNumber>

    </Transaction>

    <Transaction>

      <RetailStoreID>1</RetailStoreID>

      <SequenceNumber>3</SequenceNumber>

    </Transaction>

    </POSLog>";

            return xml;

        }

        public static void Main()

        {

            POSLog poslog = new POSLog();

            XmlSerializer serializer = new XmlSerializer(typeof(POSLog));

            var reader = new StringReader(GetXml());

            poslog = (POSLog)serializer.Deserialize(reader);

            Console.WriteLine("Deserialized and re-serialized POSLog: ");

            Console.WriteLine(poslog.GetXml(true));         

        }

    }

​

    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, 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, IndentChars = "    " }; // For cosmetic purposes.

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

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

                return textWriter.ToString();

            }

        }

    }

​