public void CheckSetSupersetOf()
        {
            q = new SetCollection <int>();
            var testSet1 = new int[] { 1, 2, 3, 4, 5 };

            q.AddRange(testSet1);
            Assert.AreEqual(true, q.IsProperSupersetOf(new int[] { 1, 2, 3 }));
        }