Ive found out that you can serialize a wpf component, in my example a FixedDocument, using the XamlWriter and a MemoryStream:

FixedDocument doc = GetDocument();
MemoryStream stream = new MemoryStream();
XamlWriter.Save(doc, stream);

And then to get it back:

stream.Seek(0, SeekOrigin.Begin);
FixedDocument result = (FixedDocument)XamlReader.Load(stream);
return result;

However, now I need to be able to serialize a DocumentPage as well. Which lacks a default constructor which makes the XamlReader.Load call throw an exception.

Is there a way to serialize a wpf component without a default constructor?