static void Main(string[] args)
        {
            int myInt = 123456789;

            myInt.DisplayDefiningAssembly();
            Console.WriteLine(myInt.ReverseDigits());

            var dataSet = new System.Data.DataSet();

            dataSet.DisplayDefiningAssembly();

            var personel  = new Personel("Sinan");
            var personels = new PersonelList();

            personels.Add(personel);
            personels.CallExtensionMethod();
        }
 public void Add(Personel personel)
 {
     staffs.Add(personel);
 }
 public static void Add(Personel personel)
 {
 }