Fetch Program ApplicationExitCode for Unit Test
===

I would like to check the ApplicationExitCode for my C# Console Program under test.  Below is my NUnit test method.  I am uncertain what to replace the question marks with.

My testing class method:

    [Test]
    public void ExitApplicationWithZeroOnNoErrors()
    {
      string[] arguments = { "--version=43" };
      var program = new Program(arguments);
      Assert.AreEqual(Utility.Status.Success, ?????);
    }

My main application Program.cs.

    public class Program
    {
        public int? Version { get; private set; }

        [STAThread]
        public static int Main(string[] arguments)
        {
            var program = new Program(arguments);
            return (int)Utility.Status.Success;
        }

        public Program(IEnumerable<string> arguments)
        {
            var parameters = new OptionSet()
                                 {
                                     {"v|version=", "Client version number.", (int v) => Version = v},
                                 };
            parameters.Parse(arguments);
        }
    }

As an aside I am using NDesk.Options class for my parameter gathering.  I attempting to write Unit Tests and utilize TDD for this project.