public void TestLengthBiggerThanCount()
        {
            List <int> ls1 = new List <int>(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
            List <int> ls2 = ListOperator <int> .SubList(ls1, 3, 11);

            List <int> ls3 = new List <int>(new int[] { 4, 5, 6, 7, 8, 9, 10 });

            Assert.AreEqual(ListOperator <int> .ValueEqual(ls3, ls2), true);
        }
        public void TestNormal()
        {
            List <int> ls1 = new List <int>(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
            List <int> ls2 = ListOperator <int> .SubList(ls1, 3, 7);

            List <int> ls3 = new List <int>(new int[] { 4, 5, 6, 7, 8 });

            Assert.AreEqual(ListOperator <int> .ValueEqual(ls3, ls2), true);
        }