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OOP = Object-Oriented Programming.
The examples use interfaces, polymorphism,....

An example of OOP-programming:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ch08Ex01
public partial class Form1 : Form
public Form1()

private void button1_Click(object sender, EventArgs e)
Button )sender).Text = "Clicked"; //This action is polymorphism
Button newButton = new Button ();
           newButton .Text =
"New Button";
           newButton .Click +=
new EventHandler (newButton_Click);
           Controls.Add (newButton );

private void newButton_Click(object sender, EventArgs e)
Button)sender).Text = "Clicked";

  • Example that create an extra button on your form. Click here:


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