private void Button_Click(object sender, RoutedEventArgs e)
{
calculations cal = new calculations();
double val1 = int.Parse(Value1_TxtBox.Text);
double val2 = int.Parse(Value2_TxtBox.Text);
double result;
switch (Functions_Combobx.SelectedIndex)
{
case 0:
result = cal.Add(val1, val2);
MessageBox.Show("The Answer is :" + result);
break;
case 1:
result = cal.Subtract(val1, val2);
MessageBox.Show("The Answer is :" + result);
break;
case 2:
result = cal.Multiply(val1, val2);
MessageBox.Show("The Answer is :" + result);
break;
case 3:
result = cal.Divide(val1, val2);
MessageBox.Show("The Answer is :" + result);
break;
}
}
static void Main(string[] args)
{
//multicast delegate
calculations deleg = new calculations(addition);
deleg += subtraction;
deleg += division;
deleg += product;
deleg.Invoke(30, 80);
}
