Xml序列化自引用/循环引用问题1

public class Student
{
public int ID { get; set; }
public string Name { get; set; }

//[XmlIgnore]
public Student StudentInfo { get; set; }
}

Student stu = new Student();
stu.ID = 1;
stu.Name = "张三";
//如果内部引用自己，Xml就会抛出异常
//序列化类型 Test.Student 的对象时检测到循环引用。
/*
* 解决方案1：在StudentInfo 添加 [XmlIgnore] ，序列化时忽略当前属性
*/
stu.StudentInfo = stu;
//如果内部引用不是自己，不会抛出异常
stu.StudentInfo = new Student()
{
ID = 2,
Name = "李四"
};
XmlSerializer xmls = new XmlSerializer(stu.GetType());
string content;
using (MemoryStream ms = new MemoryStream())
{
xmls.Serialize(ms, stu);
ms.Position = 0;
using (StreamReader reader = new StreamReader(ms))
{
content = reader.ReadToEnd();
}
}
Console.WriteLine(content);