How do you serialize a string as CDATA using XmlSerializer?

by 
[Serializable]
public class MyClass
{
    public MyClass() { }

    [XmlIgnore]
    public string MyString { get; set; }
    [XmlElement("MyString")]
    public System.Xml.XmlCDataSection MyStringCDATA
    {
        get
        {
            return new System.Xml.XmlDocument().CreateCDataSection(MyString);
        }
        set
        {
            MyString = value.Value;
        }
    }
}

Usage:

MyClass mc = new MyClass();
mc.MyString = "<test>Hello World</test>";
XmlSerializer serializer = new XmlSerializer(typeof(MyClass));
StringWriter writer = new StringWriter();
serializer.Serialize(writer, mc);
Console.WriteLine(writer.ToString());

Output:

<?xml version="1.0" encoding="utf-16"?>
<MyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <MyString><![CDATA[<test>Hello World</test>]]></MyString>
</MyClass>

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