static void Main(string[] args)
        {
             if (args.Length == 0)
            {
                // If they provide no arguments, display the last person
                Person p = Deserialize();
                Console.WriteLine(p.ToString());
            }
            else
            {
                try
                {
                    if (args.Length != 4)
                    {
                        throw new ArgumentException("You must provide four arguments.");
                    }

                    DateTime dob = new DateTime(Int32.Parse(args[1]), Int32.Parse(args[2]), Int32.Parse(args[3]));
                    Person p = new Person(args[0], dob);
                    Console.WriteLine(p.ToString());

                    Serialize(p);
                }
                catch (Exception ex)
                {
                    DisplayUsageInformation(ex.Message);
                }
            }

            Console.ReadKey();
        }
        private static void Serialize(Person sp)
        {
            // TODO: Serialize sp object         to binnaryserializer .dat to xml .xml
            using (FileStream fs = new FileStream("Person.xml", FileMode.Create))
            {
                //Exercise Number 1
                BinaryFormatter bf = new BinaryFormatter();

                //XmlSerializer xs = new XmlSerializer(typeof(Person));

                Console.WriteLine("Serialazed");

                bf.Serialize(fs, sp);
                //xs.Serialize(fs, sp);
            }
        }