static void Main(string[] args)
        {

            string sElvish = "elvish";

            string userInput = Console.ReadLine();

            string lowerUserInput = userInput.ToLower();

            Console.WriteLine(lowerUserInput);

            if (lowerUserInput == sElvish)
            {
                //do something here.
            }

            else
            {
                //Do something else here.
            }

            Console.ReadLine();
        }