protected static void CalculateSumOfNumbersExample()
        {
            int numA = 67;
            int numB = 90;
            int numC = 99;

            long[]      numbersToSumArray = { numA, numB, numC };
            List <long> numbersToSumList  = new List <long> {
                numA, numB, numC
            };

            CalculateSumOfNumbers calculateSumOfNumbers = new CalculateSumOfNumbers();
            long sumToUse = calculateSumOfNumbers.Calculate(numbersToSumArray);

            Console.WriteLine("The array sum of numA, numB, and numC is " + sumToUse);

            sumToUse = calculateSumOfNumbers.Calculate(numbersToSumList);
            Console.WriteLine("The list sum of numA, numB, and numC is " + sumToUse);
        }
        protected void CalculateComparisonTest(List <long> numbersToSumList, CalculateSumOfNumbers calculateSumOfNumbers, long answerOfSum)
        {
            long sumResult = calculateSumOfNumbers.Calculate(numbersToSumList);

            Assert.Equal(sumResult, answerOfSum);
        }