Dictionary序列化和反序列化

   //定义可序列化Dictionary类 
　　[Serializable]
    public class SerializableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, IXmlSerializable
    {
        public SerializableDictionary() { }
        public void WriteXml(XmlWriter write)       // Serializer
        {
            XmlSerializer KeySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer ValueSerializer = new XmlSerializer(typeof(TValue));
 
            foreach (KeyValuePair<TKey, TValue> kv in this)
            {
                write.WriteStartElement("SerializableDictionary");
                write.WriteStartElement("key");
                KeySerializer.Serialize(write, kv.Key);
                write.WriteEndElement();
                write.WriteStartElement("value");
                ValueSerializer.Serialize(write, kv.Value);
                write.WriteEndElement();
                write.WriteEndElement();
            }
        }
        public void ReadXml(XmlReader reader)       // Deserializer
        {
            reader.Read();
            XmlSerializer KeySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer ValueSerializer = new XmlSerializer(typeof(TValue));
 
            while (reader.NodeType != XmlNodeType.EndElement)
            {
                reader.ReadStartElement("SerializableDictionary");
                reader.ReadStartElement("key");
                TKey tk = (TKey)KeySerializer.Deserialize(reader);
                reader.ReadEndElement();
                reader.ReadStartElement("value");
                TValue vl = (TValue)ValueSerializer.Deserialize(reader);
                reader.ReadEndElement();
                reader.ReadEndElement();
                this.Add(tk, vl);
                reader.MoveToContent();
            }
            reader.ReadEndElement();
 
        }
        public XmlSchema GetSchema()
        {
            return null;
        }
    }

using (FileStream fileStream = new FileStream(fileName, FileMode.Create))  
{  
    XmlSerializer xmlFormatter = new XmlSerializer(typeof(SerializableDictionary<string, string>));  
    xmlFormatter.Serialize(fileStream, this.serializableDictionary);  
}  

using (FileStream fileStream = new FileStream(fileName, FileMode.Open))  
{  
    XmlSerializer xmlFormatter = new XmlSerializer(typeof(SerializableDictionary<string, string>));  
    this.serializableDictionary = (SerializableDictionary<string,string>)xmlFormatter.Deserialize(fileStream);  
}