web service issue

Hi all ,

I use the following web method to give xml file

public XmlDocument CustomertList()
{
conn = ConfigurationManager.AppSettings["ConnectionString"];
SqlXmlCommand cmd = new SqlXmlCommand(conn);
cmd.CommandType = SqlXmlCommandType.Sql;
// cmd.RootTag = "WorkList";
cmd.CommandText = "select name_english,ID from customers FOR XML AUTO,ELEMENTS XSINIL,ROOT('patients')";
XmlReader xr = cmd.ExecuteXmlReader();
XmlDocument myXmlDocument = new XmlDocument();
myXmlDocument.Load(xr);
// load xml content or build it up dynamically, etc
return myXmlDocument;
}

I want to get the XmlDocument by type the url (for example ) http://localhost:8088/IOSService.asmx?op=CustomertList

I need to have rss xml file , I mean I want to give the user url that give him / her the resulted xml

any suggestion please