XML Serialization

Implement public class CData : IXmlSerializable

using System.Xml;
using System.Xml.Serialization;


[Serializable]
[XmlRoot("Root")]
public class MyClass
{
    [XmlElement("Country")]
    public string Country{ get; set; }

    public CData City;
}
public string GetSerializedObjectXmlString(object objectToSerialize)
{
    string sXml;
    XmlWriterSettings oWriterSettings = new XmlWriterSettings {OmitXmlDeclaration = true, Indent = true};
    XmlSerializerNamespaces oNamespaces = new XmlSerializerNamespaces(new[] {new XmlQualifiedName("", "")});
    MemoryStream ms = new MemoryStream();
    XmlWriter xWriter = XmlWriter.Create(ms, oWriterSettings);

    try
    {
        XmlSerializer serializer = new XmlSerializer(objectToSerialize.GetType());

        serializer.Serialize(xWriter, objectToSerialize, oNamespaces);

        sXml = Encoding.UTF8.GetString(ms.ToArray());
    }
    catch (Exception ex)
    {
        sXml = string.Empty;
    }
    finally
    {
        xWriter.Close();
        ms.Close();
    }

    return sXml;
}

How do you serialize a string as CDATA using XmlSerializer?