public IPromotionCombined GetPromoOffer(string productName, string productname2)
        {
            IPromotionCombined returnVal = null;

            if (productName == "C" && productname2 == "D")
            {
                returnVal = new PromotionCandD();
            }

            return(returnVal);
        }
        static void Main(string[] args)
        {
            bool loopContinue = true;


            while (loopContinue)
            {
                Console.WriteLine("Commiting New Changes with push");
                Console.WriteLine("Please Enter Option No. 1)Product Price Calculation");
                int option = Convert.ToInt32(Console.ReadLine());
                List <SkuProduct> prodList = new List <SkuProduct>();
                SkuProduct        productA = new SkuProduct();
                SkuProduct        productB = new SkuProduct();
                SkuProductCombo   productCombo = new SkuProductCombo();
                int                         count, total, finalAmount = 0;
                List <int>                  finalPrice     = new List <int>();
                PromotionFactory            promofactory   = new PromotionFactory();
                PromotionCombinationFactory prmoCombFacory = new PromotionCombinationFactory();

                switch (option)
                {
                case 1:
                    Console.WriteLine("Enter no. of prod to buy for Product A");
                    count            = Convert.ToInt32(Console.ReadLine());
                    productA.SkuName = "A";
                    productA.count   = count;
                    prodList.Add(productA);
                    Console.WriteLine("Enter no. of prod to buy for Product B");
                    count            = Convert.ToInt32(Console.ReadLine());
                    productB.SkuName = "B";
                    productB.count   = count;
                    prodList.Add(productB);
                    Console.WriteLine("Enter no. of prod to buy for Product C");
                    count = Convert.ToInt32(Console.ReadLine());
                    productCombo.SkuName1 = "C";
                    productCombo.count1   = count;
                    Console.WriteLine("Enter no. of prod to buy for Product D");
                    count = Convert.ToInt32(Console.ReadLine());
                    productCombo.SkuName2 = "D";
                    productCombo.count2   = count;
                    foreach (SkuProduct prod in prodList)
                    {
                        IPromotion promo = promofactory.GetPromoOffer(prod.SkuName);
                        total = promo.CalculatePrice(prod.count);
                        finalPrice.Add(total);
                    }
                    IPromotionCombined promocomb = prmoCombFacory.GetPromoOffer(productCombo.SkuName1, productCombo.SkuName2);
                    total = promocomb.CalculatePrice(productCombo.count1, productCombo.count2);
                    finalPrice.Add(total);
                    foreach (int val in finalPrice)
                    {
                        finalAmount = finalAmount + val;
                    }
                    Console.WriteLine(finalAmount);
                    break;

                default:
                    Console.WriteLine("Value didn’t match earlier.");
                    break;
                }
            }
        }