There is a good link here: Displaying XML in the .NET WebBrowser Control

public XmlDocument DocumentXml
{
  set
  {
    Stream s = <defaultss.xsl from embedded resource file>

    XmlReader xr = XmlReader.Create(s);
    XslCompiledTransform xct = new XslCompiledTransform();
    xct.Load(xr);

    StringBuilder sb = new StringBuilder();
    XmlWriter xw = XmlWriter.Create(sb);
    xct.Transform(value, xw);

    this.DocumentText = sb.ToString();
  }
}