C#: using xpath to find matching node

I have the following method which loops through the <desc> node in an xml file to find if it matches the parameter "msg".
What I need to do is ,once found retrieve the <code> from the xml. How do I do that?

        static string getCode(string msg)
        {
            string filename = @"C:\temp\errors.xml";
            string xmlCode="";

            XmlDocument doc = new XmlDocument();
            doc.Load(filename);
            XmlNodeList nodes = doc.SelectNodes("/edt/ce/desc");

            foreach (XmlNode node in nodes)
            {
                if (node.InnerText.Trim().Equals(msg))
                    xmlCode = "Found";  //should be the <code> associated to the matching <desc>
                else
                    xmlCode = "Not found";

            }

            msg = xmlCode;

            return msg;
        }
            
            
This is errors.xml
<edt name="errors">
      <ce>
            <code>1111</code>
            <desc>Not here</desc>
      </ce>
      <ce>
            <code>2222</code>
            <desc>Invalid Input </desc>
      </ce>
</edt>