using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var customStack = new CustomStack();

        customStack.Push("Hello World");

        customStack.Pop();

    }

}

​

public class CustomStack : Stack

{

​

    public override void Push(object obj)

    {

        Console.WriteLine($"My custom magic for push, on the object {obj}");

        base.Push(obj);

    }

    public override object Pop()

    {

        var obj = base.Pop();

        Console.WriteLine($"My custom magic for pop, on the object {obj}");

        return obj;

    }

}