xml序列化生成xml文档出错


/// <summary>
        /// 保存配置
        /// </summary>
        public int Save()
        {
            try
            {
                XmlSerializer xs = new XmlSerializer(typeof(ConfigureMessageTY));
                string path = AppDomain.CurrentDomain.BaseDirectory + @"ConfigXml\ContentMessageTY.Config";
                if (!Directory.Exists(Path.GetDirectoryName(path)))
                    Directory.CreateDirectory(Path.GetDirectoryName(path));
                using (StreamWriter sw = new StreamWriter(path))
                {
                    xs.Serialize(sw, this);
                    sw.Close();
                    return 1;
                }
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message+"-------"+ex.StackTrace);
                return 0;
            }
        }xs.Serialize(sw, this);在执行这句花时出现异常，异常信息“生成XML文档出错”，也不知道是什么原因