how to deserialize xml arrayItems in enum if there are unrecognized elements

Question

The goal is to deserialize xml-arrayitems into my specific enum.

using System.Xml.Serialization;

public enum Example
{
    [XmlEnum(Name = "Ex1")]
    Ex1,

    [XmlEnum(Name = "Ex2")]
    Ex2
}

[XmlRoot(ElementName = "Schema", Namespace = "http://www.placeholder.com")]
public class Model
{
    [XmlArrayItem("Example")
    public List<Example> Examples;
}

It works fine as long as every element name in my xml matches one of the enum values. (as it should be)

<?xml version="1.0" encoding="UTF-8"?>
<Schema xmlns="http://www.placeholder.com" version="1">
    <Examples>
        <Example>Ex1</Example>
        <Example>Ex2</Example>
        <Example>Ex1</Example>
    </Examples>
</Schema>

However, what I want to do is deserializing any non-matching elements (e.g.: 'Ex3') into some kind of collective default value. Is there a proper way?

Things i tried:

• declared 'Example' nullable in my model

• added

  [XmlEnum(Name = "")] Unknown

  to the enum

Edit

    private static TXmlClass ReadXml<TXmlClass>(String filename)
    {    
        using (var reader = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            var xmlSerializer = new XmlSerializer(typeof(TXmlClass));
            return (TXmlClass)xmlSerializer.Deserialize(reader);
        }
    }