using System;

​

public class Program

{

    public static void Main()

    {

        string choice = "Please give me 100 on the test for no reason";

        while (choice != "n" && choice != "N")

        {

            Console.WriteLine("Input a double.");

            string input = Console.ReadLine();

            double n;

            if (double.TryParse(input, out n))

            {

                Console.WriteLine("Good job, you entered a double!");

            }

            else 

            {

                Console.WriteLine("You did not enter a double, try again. Press enter to continue.");

                Console.ReadLine();

                Console.Clear();

            }

                Console.WriteLine("Would You like to try again? (y/n) ");

                choice = Console.ReadLine();

                Console.Clear();

        }

    }

}