public void EmptyAfterAdd ()
{
XmlDictionary d = new XmlDictionary ();
XmlDictionaryString dns;
d.Add ("foo");
Assert.IsFalse (d.TryLookup (String.Empty, out dns), "#0");
Assert.IsTrue (d.TryLookup ("foo", out dns), "#1");
Assert.AreEqual (0, dns.Key, "#2");
}