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基本上我已经创建了一个用户界面，用户输入存储在两个列表中。

一个类包含两个列表，我试图XMLSerializer通过仅向序列化程序传递类名来编写一个包含正确嵌套的列表的 XML 文件。

每次我尝试这样做时，都会出现异常：

InvalidOperationException，生成 XML 文档时出错

我怎样才能解决这个问题？

代码...

//declared globally

className mInfo = new className(); //create an object that references the class

classTwo aInfo = new assessments(); //used in a seperate method in UI ignore for now.

//end of objects


//start of class - assume is has a constructor for now

[Serializable()]
    [XmlRoot]
    public class className 
    {

        public string mCode;
        public string mTitle;
        public int nOC;
        public string term;
        public string oModM;
        public bool hExam;
        //create a list to hold the data
        [XmlElement]
        public List<className> mList = new List<className>();

        [XmlElement]
        public List<classTwo> aList = new List<classTwo>();





//end of class

//start of writer...

 public void XMLWriter()
        {


           string filePath = "test.xml";


        // THIS PART CREATES THE XML FILE 

        XmlSerializer serializer = new XmlSerializer(typeof(className));
         TextWriter textWriter = new StreamWriter(filePath);
          serializer.Serialize(textWriter, mInfo);
          textWriter.Close();


        }

//end of writer
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