public void ToXMLTest()
{
char code = 'a';
string data = "Test Data";
Subfield target = new Subfield(code, data);
XElement expected = new XElement(FileMARCXML.Namespace + "subfield", new XAttribute("code", "a"), "Test Data");
XElement actual = target.ToXML();
Assert.IsTrue(XNode.DeepEquals(expected, actual));
}