using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

​

namespace DemoApplication

{

 public class Program

 {

  public static void Main(string[] args)

  {

   Stack st = new Stack();

   st.Push(1);

   st.Push(2);

   st.Push(3);

   foreach (Object obj in st)

   {

    Console.WriteLine(obj);

   }

    Console.WriteLine(); Console.WriteLine();

    Console.WriteLine("The number of elements in the stack " +st.Count);

    Console.WriteLine("Does the stack contain the elements 3 "+st.Contains(3));

  }

 }

}