Why does this code work perfectly when I actually compile it, but not in the test editor?

using System;
using System.IO;

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

          if (times <= 0) {
            Console.WriteLine ("input must be greater than 0");
            continue;
          } else {
            var i = 0;

            while (i < times) {
              Console.WriteLine ("Yay!");
              i++;
            }
            break;
          }
        } catch (System.IO.IOException) {
          Console.WriteLine ("You must enter a whole number.");
          continue;
        } catch (FormatException) {
          Console.WriteLine ("You must enter a whole number.");
          continue;
        } catch (ArgumentNullException) {
          Console.WriteLine ("You must enter a whole number.");
          continue;
        }
      }
    }
  }
}