C#

<field name="textBox" y="3.175" x="3.17" w="62" h="9">
  <ui>
    <textBox>
      <border>
        <css style="">            </css>
      </border>
      <margin/>
    </textBox>
  </ui>
  <font face="Arial"/>
  <margin topInset="1" bottomInset="1" leftInset="1" rightInset="1"/>
  <textAlign vAlign="middle"/>
  <label reserve="25">
    <Font fontFace="Arial" size="8pt" />
    <textAlign vAlign="middle"/>
    <value>
      <text>textbox label</text>
    </value>
  </label>
</field>

            XPathNodeIterator iterator = nav.Select(@"/field");
            try
            {
                while (iterator.MoveNext())
                {
                    //Do some other stuff
                    ...
                    XPathNavigator nav2 = iterator.Current.Clone();
                    if (string.Compare(nav2.Name, "field") == 0)
                    {
                    XPathNodeIterator textBoxIterator = nav2.Select("child::*/child::textBox");

                    if (textBoxIterator.Count > 0)
                    {
                        XPathExpression exp = nav2.Compile("child::Font");
                        XPathNodeIterator it = nav2.Select(exp);

                        while (it.MoveNext())
                        {
                            XPathNavigator nav3 = it.Current.Clone();
                            string fontFace = nav3.GetAttribute("typeface", nav3.NamespaceURI);
                            string fontSize = nav3.GetAttribute("size", nav3.NamespaceURI);
                        }
                    }
                }
             }
             catch
...
}