c# 支持XML序列化的泛型 Dictionary

/// <summary>       /// 支持XML序列化的泛型 Dictionary       /// </summary>       /// <typeparam name="TKey"></typeparam>       /// <typeparam name="TValue"></typeparam>       [XmlRoot("SerializableDictionary")]       public class SerializableDictionary<TKey, TValue>           : Dictionary<TKey, TValue>, IXmlSerializable       {           #region 构造函数           public SerializableDictionary()               : base()           {           }           public SerializableDictionary(IDictionary<TKey, TValue> dictionary)               : base(dictionary)           {           }             public SerializableDictionary(IEqualityComparer<TKey> comparer)               : base(comparer)           {           }             public SerializableDictionary(int capacity)               : base(capacity)           {           }           public SerializableDictionary(int capacity, IEqualityComparer<TKey> comparer)               : base(capacity, comparer)           {           }           protected SerializableDictionary(SerializationInfo info, StreamingContext context)               : base(info, context)           {           }          #endregion          #region IXmlSerializable Members           public System.Xml.Schema.XmlSchema GetSchema()           {               return null;           }           /// <summary>           /// 从对象的 XML 表示形式生成该对象           /// </summary>           /// <param name="reader"></param>           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();           }             /**/          /// <summary>           /// 将对象转换为其 XML 表示形式           /// </summary>           /// <param name="writer"></param>           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       } 

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