static void Main(string[] args)
{
Incrementer incrementer = new Incrementer();
Dozens dozensCounter = new Dozens(incrementer);
incrementer.DoCount();
Console.WriteLine("number of dozens ={0}", dozensCounter.DozensCount);
Console.ReadKey();
}
//设置成从外面只能get的属性
public Dozens(Incrementer incrementer)
{
DozensCount = 0;
incrementer.CountedADozen += Incrementer_CountedADozen;
}
