Question

I’ve tried to do this in several different forms and this is just the most recent. I usually bumble for several hours and never get anywhere so I’d like to put the question out here with my real-world example.

I have Web Services which I write XML from so that people can pull information from our server, so I have:

(namespace)
public static class WebServices
{
    public static void WriteXML(this WebService svc, DataSet results)
    {
        if (results != null)
            HttpContext.Current.Response.Write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?><xsl:stylesheet version=\"1.0\" " +
                "xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" xmlns=\"http://www.w3.org/1999/xhtml\">" + results.GetXml() + "</xsl:stylesheet>");
    }
}

Unforunately, that’s only accessible doing:

using (namespace)
....
this.WriteXML(DataSet);

When I want

using (namespace)
....
WriteXML(DataSet);

What am I missing to do so?

Answer 1

you wrote an extension method for WebService – your first parameter is this WebService svc which in turn means that your extension method WriteXML can only be called on an instance of WebService .