/// <summary>
        /// xml序列化
        /// </summary>
        /// <param name="obj">实体对象</param>
        /// <returns>返回不带命名空间的xml字符串</returns>
        public static string ObjectToXml(object obj)
        {
            string msg;
            var xml = new XmlSerializer(obj.GetType());
            var stream = new MemoryStream();
            var n = new XmlSerializerNamespaces();
            n.Add(string.Empty, string.Empty);
            xml.Serialize(stream, obj, n);
            stream.Position = 0;
            using (var reader = new StreamReader(stream))
            {
                msg = reader.ReadToEnd();
                stream.Close();
            }
            return msg;
        }

        /// <summary>
        /// xml反序列化
        /// </summary>
        /// <param name="xml">xml字符串</param>
        /// <param name="objType">对象类型</param>
        /// <returns></returns>
        public static object XmlToObject(string xml, Type objType)
        {
            object obj;
            if (string.IsNullOrWhiteSpace(xml)) return null;
            using (var reader = new StringReader(xml))
            {
                var ser = new XmlSerializer(objType);
                obj = ser.Deserialize(reader);
                reader.Close();
            }
            return obj;
        }