this.button1.Click += new EventHandler(this.button_Click); this.button2.Click += new EventHandler(this.button_Click); this.button3.Click += new EventHandler(this.button_Click); this.button4.Click += new EventHandler(this.button_Click);
private void button_Click(object sender, System.EventArgs e) { Button bouton = (Button)sender; MessageBox.Show("Clic sur "+bouton.Text); }