xml parsing select

i start to learn C# and i need some help.. i try to connect an xml file from the internet and set all is data in an selectList

i try to run this code..

    XPathDocument document = new XPathDocument("http://ift.tt/1zbbdMU");
    XPathNavigator navigator = document.CreateNavigator();

    XPathExpression query = navigator.Compile("/CURRENCIES/CURRENCY");
    XPathNodeIterator nodes = navigator.Select(query);
    XPathNavigator nodesNavigator = nodes.Current;

    XPathNodeIterator nodesText = nodesNavigator.SelectDescendants(XPathNodeType.Text, false);

    while (nodesText.MoveNext())
    {
        selectList.Items.Add(nodesText.Current.Value);
    }

but when i run it it add all the data from the xml in the selectList i want to take only the CURRENCYCODE list.. USD..GBP..

how i can get the text of the CURRENCYCODE or other else(what it need..)?