using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;



namespace WindowsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void button1_Click(object sender, EventArgs e)

        {

            Stack days = new Stack();

            days.Push("SunDay");

            days.Push("MonDay");

            days.Push("TueDay");

            days.Push("WedDay");

            days.Push("ThuDay");

            days.Push("FriDay");

            days.Push("SaturDay");

            if (days.Count ==7)

            {

                MessageBox.Show(days.Pop().ToString ());

            }

            else

            {

                MessageBox.Show("SaturDay does not exist");

            }

        }

    }

}