public void ContainsKey_Test()
        {
            PDFDictionary target = new PDFDictionary();
            PDFName       key    = new PDFName("Item1");
            IFileObject   value  = new PDFNumber(1);

            target.Add(key, value);

            PDFName key2 = new PDFName("Item2");

            target.Add(key2, value);
            Assert.AreEqual(2, target.Count);

            bool expected = true;
            bool actual;

            actual = target.ContainsKey(key);
            Assert.AreEqual(expected, actual);

            key      = new PDFName("NotIncluded");
            expected = false;
            actual   = target.ContainsKey(key);
            Assert.AreEqual(expected, actual);
        }