public static void Main()
 {
     List list = new List();
     for (int i = 0; i < 10; ++i)
     {
         list.Add(i);
     }
     list.DeleteElement(8);
     list.DeleteElement(9);
     list.DeleteElement(11);
     list.DeleteElement(1);
     list.DeleteElement(3);
     list.Pop();
     Console.WriteLine(list.Top());
     list.Print();
     Console.WriteLine(list.Search(5));
     Console.WriteLine(list.Search(11));
 }