XML Dynamic Node List

Hello.
I am able to read XML data from disk into strings. I obviously created these strings manually. Is there a way to achieve this dynamically?

Code:

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XmlDocument xDoc = new XmlDocument();
            xDoc.LoadXml(message);

            XmlNodeList name = xDoc.GetElementsByTagName("myName");
            XmlNodeList telephone = xDoc.GetElementsByTagName("myTelephone");
            XmlNodeList email = xDoc.GetElementsByTagName("myEmail");
            XmlNodeList age = xDoc.GetElementsByTagName("myAge");
            XmlNodeList sex = xDoc.GetElementsByTagName("mySex");

            mname = name[0].InnerText;
            mtel = telephone[0].InnerText;
            memail = email[0].InnerText;
            mage = age[0].InnerText;
            msex = sex[0].InnerText;

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Let's say at some point the XML file changes and I want to add a node for first name in the XML file. Is there a way that my C# program could read this first name into a string without me defining it previously?
Any help is appreciated.

Perhaps you can read the Xml document into a data set using the DataSet.ReadXml method. That way you have all the data in one place and you can access whatever you want.