static void Main(string[] args)
 {
     string filename = "AppSettings.config";
     if (args.Length > 0)
         filename = args[0];
     var threader = new FibonacciThreader(filename);
     threader.Execute();
 }
        static void Main(string[] args)
        {
            string filename = "AppSettings.config";

            if (args.Length > 0)
            {
                filename = args[0];
            }
            var threader = new FibonacciThreader(filename);

            threader.Execute();
        }