Attach an xml file with xsl applied to it in mail

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ASP.NET

XML

XSLT

Hi all,
I want to attach an xml file with xsl applied to it in my mail.
In my project, when i select an xml file and send it to someone(to address), then it should attch that xml file with xsl applied to it and sent to toAddress.
I have written code, but its added in body. I want it to attach with dynamic created file in mail
My code:

string strFullPathXml = Server.MapPath("strCCDXml.xml");
                   string strFullPathXsl = Server.MapPath("xsl.xsl");
                   string strFullPathHtml = Server.MapPath("Result.html");

                   StringBuilder sb = new StringBuilder();
                   XslCompiledTransform xslt = new XslCompiledTransform();
                   xslt.Load(strFullPathXsl);
                   using (XmlTextWriter xtw = new XmlTextWriter(new StringWriter(sb)))
                   {
                       xslt.Transform(strFullPathXml, xtw);
                       xtw.Flush();
                   }