I'm having a bit of trouble with the final steps.

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            var input = Console.ReadLine();

            try {
                var counter = Convert.ToInt32(input);
                var count = 0;

                while (count < counter)
                {
                    if (counter <= 0) {
                     Console.WriteLine("You must enter a positive number.");   
                    }
                    Console.WriteLine("\"Yay!\"");
                    count++;

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