C# - while loop ignoring input?

Hello!

I'm doing a school exercise. I actually coded, finished and signed off on the program, before I decided to go back to it out of boredom. In v2.0 I've finding that the program is ignoring all input inside of a while loop, except the input that breaks the loop. I've been beating my head on the wall against this since yesterday. I thought at first that it was an issue with Monodevelop, but I took the code over to Visual Studio 2010 and found the problem replicating.

The idea is to list all of the records in an array. I've tested the foreach loop separate to the while{X}, and it runs perfectly.

A friend gave it a once-over last night, but found nothing awry:

        while (true) {

            // Clear the console to begin.
            Console.Clear();

            // The user can view records or exit, at this point.
            Console.WriteLine("Menu:");
            Console.WriteLine();
            Console.WriteLine("1. List records.");
            Console.WriteLine("2. View record.");
            Console.WriteLine("9. Exit.");
            Console.WriteLine();

            Console.Write("Enter Choice: ");
            int userMenuChoice = Convert.ToInt32(Console.ReadLine());

            if (userMenuChoice == 1)
            {
                foreach (string name in employeeName)
                {
                    index++;
                    Console.WriteLine("{0}. {1}", index, name);
                }
            }
            else if (userMenuChoice == 9)
            {
                break;
            }

        }