Web Browser control with it and display as a Xml

Question

I have a xml. I want to set the value of the Web Browser control with it and display as a Xml.
 
how do I tell it to display as a XML ?

   System.Xml.XmlTextReader oXmlTextReader = new

            System.Xml.XmlTextReader(@"D:\Demo\data.xml");

            System.Text.StringBuilder oStringBuilder = new System.Text.StringBuilder( ) ;

            oStringBuilder.Append(oXmlTextReader.ReadOuterXml( ) ) ;

            while (oXmlTextReader.Read()) 

            {

                oStringBuilder.Append(oXmlTextReader.ReadOuterXml( ) ) ;

            }

            wbWebBrowser.Navigate(oStringBuilder.ToString());

        }