C# entity class serialization and deserialization 1 (XmlSerializer)

    /// <summary>
    /// 实体类序列化的反序列化的类
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public abstract class EntityClassXmlSerializer<T>
    {
        /// <summary>
        /// 实体类序列化成xml string
        /// </summary>
        /// <param name="entity"></param>
        /// <returns></returns>
        public static string ToXMLString(T entity)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                XmlTextWriter writer = new XmlTextWriter(stream, null);
                XmlSerializer xml = new XmlSerializer(entity.GetType());
                xml.Serialize(writer, entity);
                writer.Formatting = Formatting.Indented;
                using (StreamReader sr = new StreamReader(stream, System.Text.Encoding.UTF8))
                {
                    stream.Position = 0;
                    string xmlString = sr.ReadToEnd();
                    sr.Close();
                    stream.Close();
                    return xmlString;
                }
            }
        }
        /// <summary>
        /// 实体类反序列化
        /// </summary>
        /// <param name="xml"></param>
        /// <returns></returns>
        public static T ReadFromXML(string xml)
        {
            T entity;
            byte[] byts = Encoding.UTF8.GetBytes(xml);
            using (MemoryStream stream = new MemoryStream(byts))
            {
                XmlSerializer xs = new XmlSerializer(typeof(T));
                entity = (T)xs.Deserialize(stream);
                return entity;
            }
        }
    }