string[,] Tableau = new string[5, 5]; for (int i=0; i< 5; i++) for (int j = 0; j < 5; j++) Tableau[i, j] = string.Format("itération i:{0} j:{1}", i, j);
private void button1_Click(object sender, EventArgs e) { string[,] Tableau = new string[5, 5]; for (int i=0; i< 5; i++) for (int j = 0; j < 5; j++) Tableau[i, j] = string.Format("itération i:{0} j:{1}", i, j); MessageBox.Show(Tableau[0, 4]); }