what is wrong with this?!

using System;

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

            try
            {
            int count = int.Parse(input);
            int i = 0;
                if (count==0)
                {
                    Console.WriteLine("You must enter a whole number.");
                }
                else
                {
                i += 1;
                while(i < count)
                {
                Console.WriteLine("Yay!");
                }
                }
            }
            catch (FormatException)
            {
            Console.WriteLine("You must enter a whole number.");
            }   
        }
    }
}