WPF DataGrid Control Template

I am trying to customize the WPF 4.0 DataGrid and need a listing of its control template (also the control template for the nested DataGridColumnHeadersPresenter - PART_ColumnHeadersPresenter). I found this link with provides many control templates, but DataGrid is missing from the list! Is there any place where the control templ开发者_JAVA百科ate for the latest WPF 4.0 DataGrid is published. I tried to get it using the following code, but it does not give me nested templates:

// Create an XmlWriter
StringBuilder sb = new StringBuilder();
XmlWriterSettings xmlSettings = new XmlWriterSettings
    { Indent = true, IndentChars = "    ", NewLineOnAttributes = true };
XmlWriter writer = XmlWriter.Create(sb, xmlSettings);

// Write the control template
ControlTemplate template = controlToExtract.Template;
XamlWriter.Save(template, writer);

// Write results to display
controlTemplate.AppendText(sb.ToString());

There is a link to download the Default WPF Themes from Control Styles and Templates on MSDN. You can also use the Reflector BamlViewer add-in to read the themes directly from the assemblies.