private void SubtractButton_Click(object sender, EventArgs e)
{
calculator.firstNo = Convert.ToDouble(firstNumberTextBox.Text);
calculator.secoundNo = Convert.ToDouble(secondNumberTextBox.Text);
calculator.Subtraction();
resultTextBox.Text = Convert.ToString(calculator.result);
}
private void SubtractButton_Click(object sender, EventArgs e)
{
int firstNumber = Convert.ToInt32(firstNumberTextBox.Text);
int secondNumber = Convert.ToInt32(secondNumberTextBox.Text);
int result = calculator.Subtraction(firstNumber, secondNumber);
resultTextBox.Text = Convert.ToString(result);
}