internal sealed class Coffee

    {

        public string GetName()

        {

            return "You selected Maxwell coffee.";

        }

    }

    internal sealed class Juice

    {

        public string GetName()

        {

            return "You selected orange juice.";

        }

    }

　　 internal sealed class DynamicDemo

    {

        public static void Main()

        {

            Console.WriteLine("Please Select Your Drink:1--Juice;2--Coffee");

            var nDrinkRead = Console.Read();

            dynamic drink = GetDrink(nDrinkRead);

            Console.WriteLine(drink.GetName());

            Console.Read();

        }

        private static object GetDrink(int i)

        {

            if (i == ) return new Juice();

            return new Coffee();

        }

    }