用switch改写if else if else

            switch (product[2] ) 
            {
                case "S":
                    size = "Small";
                    break;
                case "M":
                    size = "Medium";
                    break;
                case "L":
                    size = "Large";
                    break;
                default:
                    size = "One Size Fits All";
                    break;
            }
            Console.WriteLine($"Product: {size} {color} {type}");