// Credit to http://weblogs.asp.net/pwelter34/archive/2006/05/03/444961.aspx



using System;

using System.Collections.Generic;

using System.Xml.Serialization;



[XmlRoot("dictionary")]

public class SerializableDictionary<TKey, TValue>

    : Dictionary<TKey, TValue>, IXmlSerializable

{

    #region IXmlSerializable Members

    public System.Xml.Schema.XmlSchema GetSchema()

    {

        return null;

    }



    public void ReadXml(System.Xml.XmlReader reader)

    {

        XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));

        XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));



        bool wasEmpty = reader.IsEmptyElement;

        reader.Read();



        if (wasEmpty)

            return;



        while (reader.NodeType != System.Xml.XmlNodeType.EndElement)

        {

            reader.ReadStartElement("item");



            reader.ReadStartElement("key");

            TKey key = (TKey)keySerializer.Deserialize(reader);

            reader.ReadEndElement();



            reader.ReadStartElement("value");

            TValue value = (TValue)valueSerializer.Deserialize(reader);

            reader.ReadEndElement();



            this.Add(key, value);



            reader.ReadEndElement();

            reader.MoveToContent();

        }

        reader.ReadEndElement();

    }



    public void WriteXml(System.Xml.XmlWriter writer)

    {

        XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));

        XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));



        foreach (TKey key in this.Keys)

        {

            writer.WriteStartElement("item");



            writer.WriteStartElement("key");

            keySerializer.Serialize(writer, key);

            writer.WriteEndElement();



            writer.WriteStartElement("value");

            TValue value = this[key];

            valueSerializer.Serialize(writer, value);

            writer.WriteEndElement();



            writer.WriteEndElement();

        }

    }

    #endregion

}