Asynchronous multithreaded Intrada ALPR

sample.cs

using System;
using System.IO;
using System.Linq;
using System.Threading;
using Intrada.ALPR;

namespace RecognizeHotFolder
{
    class Program
    {

        static void HandleResult(int id, string filename, Result result)
        {
            Console.WriteLine( filename + "\t" + result );
            File.Delete(filename);
        }

        static void Main(string[] args)
        {
            try
            {
               ThreadedIntradaALPR intrada = new ThreadedIntradaALPR("COMPANY_NAME>", 
                                                "<COMPANY_KEY>", 4, "settings.txt",HandleResult);
               string[] lastfilenames = Directory.GetFiles(".\\hotfolder", "*.jpg");

               while (!Console.KeyAvailable)
               {
                   string[] filenames = Directory.GetFiles(".\\hotfolder", "*.jpg");

                   foreach (string filename in filenames.Except(lastfilenames))
                   {
                      intrada.Recognize(filename);
                   }

                   lastfilenames = filenames;
                   Thread.Sleep(1000);
               }

               intrada.Stop();
               Console.ReadLine();
            }
            catch (IntradaException e)
            {
               Console.WriteLine("Error: " + e);
            }
        }
    }
}