The XElement class explicitly implements the IXmlISerializable interface?

Question

I see a sentence on a training book.
"The XElement class explicitly implements the IXmlSerializable
interface, which contains the GetSchema, ReadXml, and
WriteXml methods so this object can be serialized."
I don't understand it. From
the example, explicitly implements the IXmlSerializable interface is from a custom class rather than XElement class. Is
MSDN wrong?

Answer 1

I mean in the stackoverflow example,the class is a customized one "MyCalendar:IXmlSerializable"
public class MyCalendar : IXmlSerializable
private string _name;
private bool _enabled;
private Color _color;
private List<MyEvent> _events = new List<MyEvent>();
public XmlSchema GetSchema() { return null; }
public void ReadXml(XmlReader reader)
If XElement is a class that implements IXmlSerializable, what is the detail then?
public class XElement : IXmlSerializable
public XmlSchema GetSchema() { *detail*?; }
public void ReadXml(XmlReader reader){*detail*?}
Any source code of XElement class?