public void This_Empty ()
{
StringDictionary sd = new StringDictionary ();
sd[String.Empty] = null;
Assert.IsNull (sd[String.Empty], "this[String.Empty]");
Assert.AreEqual (1, sd.Count, "Count-1");
Assert.IsTrue (sd.ContainsKey (String.Empty), "ContainsKey");
Assert.IsTrue (sd.ContainsValue (null), "ContainsValue");
}