Simplest way to transform XML to HTML with XSLT in C#?

XSLT newbie question: Please fill in the blank in the C# code fragment below:

public static string TransformXMLToHTML(string inputXml, string xsltString) {
  // insert code here to apply the transform specified by xsltString to inputXml 
  // and return the resultant HTML string.
  // You may assume that the xslt output type is HTML.
}

Thanks!