protected void Promote()
{
// It's not a good practice to instanciate a object inside of a method
// Because this creates coupling or dependency of this object
var calculator = new RateCalculator();
var rating = calculator.Calculate(this);
if (rating == 10)
{
Console.WriteLine("Promoted to Level 1");
}
else
{
Console.WriteLine("Promoted to Level 2");
}
}
static void Main(string[] args)
{
var customer = new Customer();
customer.Id = 1;
customer.Name = "Helmut";
Amazon.RateCalculator calculator = new RateCalculator();
var car = new Car("BL1258");
// downcasting and upcasting
Text text = new Text();
Shape shape = text;
text.Width = 200;
shape.Width = 100;
System.Console.WriteLine(text.Width);
Shape shapeDown = new Text();
Text textDown = (Text)shape;
}
