Cleaning up my code

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            var entry = Console.ReadLine(); 
            var counter = 0;

            try
            {
                var printNum = int.Parse(entry); //Convert entry string to an int named printNum

                if(printNum < 0) //Prompt the user if a positive number is provided
                {
                    Console.Write("You must enter a positive number.");
                }
                else
                {
                    while(printNum > counter) //Print the specified number of "Yay!"s
                    {
                        Console.Write("Yay!");
                        counter++;
                    }
                }
            }
            catch(FormatException)
            {
                Console.WriteLine("You must enter a whole number");
            }

        }
    }
}