private void btnminus_Click(object sender, EventArgs e)
{
if (validateinput())
{
int minus = mycalculator.minus((int)nmb1.Value, (int)nmb2.Value);
MessageBox.Show("int minus:" + minus);
}
}
private void btnminus_Click(object sender, EventArgs e)
{
if (validateinpot())
{
int minus = calculator.minus((int)txtnumber1.Value, (int)txtnumber2.Value);
MessageBox.Show("int minus:" + minus);
}
}
