XSL Transformation through code does not result in the same output as XSL transformation done through a tool.

Question

I am transforming my XML file to another XML file using the XslCompiledTransform classes available in the .NET framework 3.5

Here's my code.

private static void transformUtil(string sXmlPath, string sXslPath, string outputFileName)
    {
        try
        {

            XPathDocument myXPathDoc = new XPathDocument(sXmlPath);
            XslCompiledTransform myXslTrans = new XslCompiledTransform();
            //load the Xsl 
            myXslTrans.Load(sXslPath);
            //create the output stream
            XmlTextWriter myWriter = new XmlTextWriter(outputFileName, null);
            //do the actual transform of Xml
            myXslTrans.Transform(myXPathDoc, null, myWriter);
            myWriter.Close();
        }
        catch (Exception e)
        {

            EventLogger eventLog;
            eventLog = new EventLogger("transformUtil", e.ToString());
        }

    }
}

The code works, but the output file does not have the XML declaration in the header.

**<?xml version="1.0" encoding="utf-8"?>**

I am at a loss to understand this. When I use the same XSL file to transform the XML, using a tool like notepad++ or visual studio, the transformation contains the XML declaration in the header. So is XslCompiledTransform responsible for truncating this declaration? I am puzzled.

Anyone else facing similar issues?

My XSL file header looks like this.

 <?xml version="1.0" encoding="iso-8859-1"?>