Code not working for the quiz

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            bool state = true;

            while (state)
            {
                Console.Write("Enter the number of times to print \"Yay!\": ");

                // Get user input
                string userInput = Console.ReadLine();
                int currentNumber = 0;

                try
                {
                    var counter = int.Parse(userInput);

                    if(counter <= 0)
                    {
                        Console.WriteLine("You must enter a whole number.");
                        continue;
                    }


                    while (currentNumber < counter)
                    {
                        Console.WriteLine("Yay!");
                        currentNumber += 1;

                        if (currentNumber == counter)
                        {
                            state = false;
                            break;
                        }
                    }

                }
                catch (FormatException)
                {
                    Console.WriteLine("You must enter a whole number.");
                    continue;
                }
                catch (ArgumentNullException)
                {
                    Console.WriteLine("You must enter a whole number.");
                    continue;
                }
            }
        }
    }
}