currency conversion program functionality...please help!!!

Hi Just need a minor change, see below:

   static void Main(string[] args)
        {
            string userResponse = messageModule();
            while (userResponse == "Yes")
            {
                string input = inputModule();
                double output = conversionModule(input);
                outputModule(input, output);
                Console.WriteLine("Do want to convert more money?Y/N");
                userResponse = Console.ReadLine();
            }

            Console.WriteLine("Thanks and goodbye");
        }