public void OddSumTest()
        {
            int[] nums = new int[] { 1, 5, 4, 3, 12 };
            Assert.AreEqual(9, BasicQuestions.OddSum(nums));

            nums = new int[] { 1, 5, 4, 3, 12, 1 };
            Assert.AreEqual(10, BasicQuestions.OddSum(nums));
        }
        public void SwapdoubleTest()
        {
            double a = 1, b = 2;

            BasicQuestions.Swap(ref a, ref b);
            Assert.AreEqual(a, 2);
            Assert.AreEqual(b, 1);
        }
        public void SwaplongTest()
        {
            long a = 1, b = 2;

            BasicQuestions.Swap(ref a, ref b);
            Assert.AreEqual(a, 2);
            Assert.AreEqual(b, 1);
        }
        public void SwapIntTest()
        {
            int a = 1, b = 2;

            BasicQuestions.Swap(ref a, ref b);
            Assert.AreEqual(a, 2);
            Assert.AreEqual(b, 1);
        }