序列化或反序列化成一个字符串：
public static string XMLSerialize<T>(T entity)  
       {  
           StringBuilder buffer = new StringBuilder();  
             
           XmlSerializer serializer = new XmlSerializer(typeof(T));  
           using (TextWriter writer = new StringWriter(buffer))  
           {  
               serializer.Serialize(writer, entity);  
           }  
           
           return buffer.ToString();  
             
       } 
反序列化：
public static T DeXMLSerialize<T>(string xmlString)  
        {  
            T cloneObject = default(T);  
  
            StringBuilder buffer = new StringBuilder();  
            buffer.Append(xmlString);  
  
            XmlSerializer serializer = new XmlSerializer(typeof(T));  
  
            using (TextReader reader = new StringReader(buffer.ToString()))  
            {  
                Object obj = serializer.Deserialize(reader);  
                cloneObject = (T)obj;  
            }  
  
            return cloneObject;  
        }