[Test]
        public void EmptyConstraint()
        {
            //EmptyConstraint tests that an object is an empty string,
            //directory or collection.

            //Syntax: Is.Empty
            string aString = String.Empty;
            Assert.That(aString, Is.Empty);
            string path = Environment.CurrentDirectory;
            DirectoryInfo dirInfo = new DirectoryInfo(path + @"\test");
            Assert.That(dirInfo, Is.Empty);

            int[] collection = new int[] { };
            Assert.That(collection, Is.Empty);


            //Notes:
            ///EmptyConstraint creates and uses either an EmptyStringConstraint,
            ///EmptyDirectoryConstraint or EmptyCollectionConstraint depending
            ///on the argument tested.
            ///A DirectoryInfo argument is required in order to test for an
            ///empty directory.To test whether a string represents a directory
            ///path, you must first construct a DirectoryInfo.
        }