How to serialize multiple objects into an existing XmlDocument, without having the namespaces on each component?

Question

How to serialize multiple objects into a existing XmlDocument in .Net/C#?

I have a XmlDocument, which already contains data. I have multiple objects. Now I want to s

Answer 1

This will serialize objects and append them to a XmlDocument. While de-/serializing the code will resolve the namespaces. @Alex: Thanks for the example with XPathNavigator.

void test2()
{
    XmlDocument doc = new XmlDocument();
    XmlNode root = doc.AppendChild(doc.CreateElement("root"));

    doc.DocumentElement.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
    doc.DocumentElement.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema");

    serializeAppend(root, new object[] { 1, "two", 3.0 });  // serialize object and append it to XmlNode
    var obj = deserialize(root.ChildNodes[0]);    // deserialize XmlNode to object
}
T deserialize(XmlNode node)
{
    XPathNavigator nav = node.CreateNavigator();
    using (var reader = nav.ReadSubtree())
    {
        var serializer = new XmlSerializer(typeof(T));
        return (T)serializer.Deserialize(reader);
    }
}
void serializeAppend(XmlNode parentNode, object obj)
{
    XPathNavigator nav = parentNode.CreateNavigator();
    using (var writer = nav.AppendChild())
    {
        var serializer = new XmlSerializer(obj.GetType());
        writer.WriteWhitespace("");
        serializer.Serialize(writer, obj);
        writer.Close();
    }
}