using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Do you enjoy C# ? (yes/no/maybe)");

        string input = Console.ReadLine();

        switch(input.ToLower())

        {

            case "yes":

            case "maybe":

                Console.WriteLine("Great!");

                break;

            case "no":

                Console.WriteLine("Too bad!");

                break;

            default:

                Console.WriteLine("I'm sorry, I don't understand that!");

                break;

        }

    }

}

​