public Form1()
{
InitializeComponent();
var simpleCalculator = new SimpleCalculator();
buttons = new Dictionary<Button, Func<string, string, string>>
{
{btnAdd, simpleCalculator.Add},
{btnSubtract, simpleCalculator.Subtract},
{btnMultiply, simpleCalculator.Multiply},
{btnDivide, simpleCalculator.Divide}
};
foreach (var button in buttons.Keys)
button.Click += (b, e) => MessageBox.Show(buttons[(Button) b](txtNum1.Text, txtNum2.Text));
}
public static void Main(string[] args)
{
SimpleCalculator simpleCalculator = new SimpleCalculator();
}
public static void InitCalculator()
{
testCalculator = new SimpleCalculator();
}