private void ButtonClick(object sender, EventArgs e)
{
string firstValueText = TextBox1.Text;
double firstValue = Convert.ToDouble(firstValueText);
string secondValueText = textBox2.Text;
double secondValue = Convert.ToDouble(secondValueText);
string operation = ((Button)sender).Name;
ITwoArgumentsCalculate calculator = TwoArgumentFactory.CreateCalculator(operation);
double result = calculator.Calculate(firstValue, secondValue);
label1.Text = result.ToString();
}
public void CalculateDivide2()
{
ITwoArgumentsCalculate calculator = TwoArgumentFactory.CreateCalculator("Divide");
Assert.Throws <Exception>(() => calculator.Calculate(7, 0));
}