Program to peek elements from stack in C#

using System;
using System.Collections;

namespace ConsoleApplication1
{
    
    class Program
    {
        static void Main()
        {
            Stack S = new Stack(5);

            S.Push(10);
            S.Push(20);
            S.Push(30);
            S.Push(40);

            Console.WriteLine("Peeked Element: " + S.Peek());
            Console.WriteLine("Peeked Element: " + S.Peek());
            Console.WriteLine("Peeked Element: " + S.Peek());
            Console.WriteLine("Peeked Element: " + S.Peek());

        }
    }
}

Output

Peeked Element: 40
Peeked Element: 40
Peeked Element: 40
Peeked Element: 40

Here, we get element from top of stack, it always return top most element.

Note: In above program, to use 'Stack' class, we need to include System.Collection namespace.