Arreglos Bidimensionales Visual Java (visual J#)

Codigo:

int[,] matriz = new int[3,3];
int i, j, k = 1;
private void button1_Click(Object sender, System.EventArgs e)
{
for (i = 0; i <= 2; i++)
{
for (j = 0; j <= 2; j++)
{

matriz[i, j] = k;
k++;
}
}
}

private void button2_Click(Object sender, System.EventArgs e)
{
int i;
for (i=0;i<=2;i++)
listBox1.get_Items().Add(System.Convert.ToString(matriz[i,0])+System.Convert.ToString(matriz[i,1])+(System.Convert.ToString(matriz[i,2])));

}

}