There're a class named 'RadDocument' and a class named 'HtmlFormatProvider', through which we can convert a html stream to an instance of class 'RadDocument', then we can get an xaml string using 'XamlFormatProvider'. Are there any equivalents in ASP.NET AJAX library instead of 'HtmlFormatProvider' and 'XamlFormatProvider' to support the conversion between html and xaml?