I was recently asked how to display formatted XML in this control. Here's just one way. I'm sure you can find ways to improve upon it.

private void DisplayXml (
     AxSHDocVw.AxWebBrowser browser,
     XmlDocument document)
 {
   // generate a unique file name
     string filnam = Environment.GetFolderPath(
         Environment.SpecialFolder.InternetCache)
         + "\\" + document.GetHashCode().ToString();
 
   // clean up just incase
   if (File.Exists(filnam))
     File.Delete(filnam);
 
   // write wsdl to a temporary file
   StreamWriter file = File.CreateText(filnam);
 
   string text = document.OuterXml.Replace("utf-16","utf-8");
 
   file.Write(text);
   file.Close();
   file = null;
 
   // navigate to the temporary file
   object refmissing = System.Reflection.Missing.Value;
   browser.Navigate(filnam, ref refmissing,
         ref refmissing, ref refmissing, ref refmissing);
 }

This can be used when the control has not yet been initialized and does not yet have a body or DOM.