C# sample program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.IO;

namespace XmlTest
{
    class Program
    {
        static void Main(string[] args)
        {
            bool doArray = true; // set to true to change to an array
            Config config = new Config(doArray);

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

            // Writing the document requires a TextWriter.
            TextWriter writer = new StreamWriter("Xmltest" + ".xml");

            // Serialize the object, and close the TextWriter.
            serializer.Serialize(writer, config);
            writer.Close();
        }
    }

        [Serializable]
    [XmlInclude(typeof(MyDataItem))]
    public class Config
    {

        public object tmp;

        public Config()
        {

        }

        public Config(bool doArray)
        {

            MyDataItem o = new MyDataItem();
            if (doArray)
                o.Value = new int[1];
            else
                o.Value = 0;

            tmp = o;
        }



    }

    [Serializable]
    public class MyDataItem
    {
        public object Value;

    }
}