Load XML element

Ive trying to make a program which needs to save settings to a file, usually I would use an ini equivelent file, however I have decided to move on and look at using an XML file instead, however all my googling I cannot find a way of just loading a particular element up from an xml file, everything seems to load each node up in a loop and you search inside it, which seems a bit daft to me.

What Id like to do is load an elements address up (sorry if thats not the right terminology) , for example if I had an xml file such as:-

<SETTINGS>
<Release>
<ProgName>Empire Burlesque</ProgName>
<Coder>Bob Dylan</Coder>
<Country>USA</Country>
</Release>
<Email>
<SMTPServer>mail.google.com</SMTPServer>
<SMTPPort>25</SMTPPort>
<MailFrom>someone@somewhere.com</MailFrom>
</Email>
<SETTINGS>

And I wanted to get the SMTP server, I thought I could do something like:-

			XmlDocument doc = new XmlDocument();
			doc.Load("settings.xml");

			XmlNode node = new xmlNode(doc);

			string smtpServer;
			smtpServer = node.search("SETTINGS\Email\SMTPServer");

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And to write to an XML file, I thought:-

			XmlDocument doc = new XmlDocument();
			doc.Load("settings.xml");

			XmlNode node = new xmlNode(doc);
			node.search("SETTINGS\Email\SMTPServer") = "smtp.yahoo.com";

			doc.save();			

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I know this is oversimplifying XML files by using them as a settings database, but if I want to store complex records Id use a database not an XML file.

I cant find any references on google for reading and writing one element like above, am I missing something here?