using System; //namespace declaration

​

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("enter your coffee size. Here is the Menu");

        Console.WriteLine("----------------------------------------");

        Console.WriteLine(" Small Coffee =1 \n Medium Coffee =2 \n Large Coffee=3");

        int UserNum = int.Parse(Console.ReadLine());

        switch (UserNum)

        {

            case 1:

               Console.WriteLine(" Thanks for shopping with us..\n We would like to know the feedback from your end to help ourselves improve the service. \n Please enter either yes or no to provide your valuable feedback ");

            string UserChoice = Console.ReadLine();

            switch (UserChoice)

                {

                    case "yes":

                        Console.WriteLine("Your coffee size is 1.Thanks for your positive feedback");

                        break;

                    case "no":

                        Console.WriteLine("sorry, we will try to improve the performance and thanks for feedback");

                        break;

                    default:

                        Console.WriteLine("please let us know your feedback");

                        break;

                }

                break;

            case 2:

                    Console.WriteLine("Your coffee size is 2.Thanks for shopping with us.");

                    break;

            case 3:

                Console.WriteLine("Your coffee size is 2.Thanks for shopping with us.");

​

                break;

​

            default:

                Console.WriteLine("please select your coffee size");

                break;

        }

    }

}