How to use C# Stack Class

The Stack class represents a last-in-first-out (LIFO) Stack of Objects. Stack follows the push-pop operations. That is we can Push (insert) Items into Stack and Pop (retrieve) it back . Stack is implemented as a circular buffer. It follows the Last In First Out (LIFO) system. That is we can push the items into a stack and get it in reverse order. Stack returns the last item first. As elements are added to a Stack, the capacity is automatically increased as required through reallocation.

Commonly used methods :

  1. Push : Add (Push) an item in the Stack data structure
  2. Pop : Pop return the last Item from the Stack
  3. Contains: Check the object contains in the Stack

Push : Add (Push) an item in the Stack data structure


  1. Object : The item to be inserted.

Pop : Pop return the item last Item from the Stack


  1. Object : Return the last object in the Stack

Contains : Check the object contains in the Stack


  1. Object : The specified Object to be search

The following CSharp Source code shows some of important functions in Stack Class:

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()

        private void button1_Click(object sender, EventArgs e)
            Stack days = new Stack();
            if (days.Count ==7)
                MessageBox.Show(days.Pop().ToString ());
                MessageBox.Show("SaturDay does not exist");

When you execute this C# program add seven items in the stack . Then it check the count is equal to 7 , if it is seven then pop() the item. The message box will display SaturDay. (C) 2021    Founded by raps mk
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