XPathDocument myXPathDoc = new XPathDocument(<xml file path>) ;

XslTransform myXslTrans = new XslTransform() ;
myXslTrans.Load(<xsl file path>);

XmlTextWriter myWriter = new XmlTextWriter("result.html",null) ;

myXslTrans.Transform(myXPathDoc,null,myWriter) ;

XmlTransformUtil.exe <xml file path> <xsl file path>

using System ;
using System.IO ;
using System.Xml ;
using System.Xml.Xsl ;
using System.Xml.XPath ;

public class XmlTransformUtil{

    public static void Main(string[] args){
        
        if (args.Length == 2){
            
            Transform(args[0], args[1]) ;
            
            
        }else{
            
            PrintUsage() ;
            
        }
        
    
    }
    
    public static void Transform(string sXmlPath, string sXslPath){
        
        try{
            
            //load the Xml doc
            XPathDocument myXPathDoc = new XPathDocument(sXmlPath) ;

            XslTransform myXslTrans = new XslTransform() ;
            
            //load the Xsl 
            myXslTrans.Load(sXslPath) ;
            
            //create the output stream
            XmlTextWriter myWriter = new XmlTextWriter
				("result.html", null);
            
            //do the actual transform of Xml
            myXslTrans.Transform(myXPathDoc,null, myWriter);        

            myWriter.Close() ;


        }catch(Exception e){

            Console.WriteLine("Exception: {0}", e.ToString());
        }
        
    }
    
    
    public static void PrintUsage(){
        Console.WriteLine
		("Usage: XmlTransformUtil.exe <xml path> <xsl path>");
    }

}