}private void btnresta_Click(object sender, EventArgs e){

int num1, num2, resta;num1 = Convert.ToInt32(txtnum1.Text);num2 = Convert.ToInt32(txtnum2.Text);resta = num1 - num2;MessageBox.Show("La resta es: " + resta);

}private void btnmultiplicacion_Click(object sender, EventArgs e){

int num1, num2, multiplicacion;num1 = Convert.ToInt32(txtnum1.Text);num2 = Convert.ToInt32(txtnum2.Text);multiplicacion = num1 * num2;MessageBox.Show("La ,multiplicacion es: " + multiplicacion);

}private void btndivicion_Click(object sender, EventArgs e){

float num1, num2, division;num1 = Convert.ToInt32(txtnum1.Text);num2 = Convert.ToInt32(txtnum2.Text);division = num1 / num2;MessageBox.Show("La division es: " + division);

}}

}