private static void LoudDialModem()
{
Console.WriteLine("LoudDialModem");
Modem m = new HayesModem();
Modem d = new LoudDialModem(m);
Console.WriteLine((null == d.PhoneNumber));
Console.WriteLine(0.Equals(d.SpeakerVolume));
d.Dial("5551212");
Console.WriteLine("5551212".Equals(d.PhoneNumber));
Console.WriteLine(10.Equals(d.SpeakerVolume));
Console.WriteLine("");
}
private static void CreateHayes()
{
Console.WriteLine("CreateHayes");
Modem m = new HayesModem();
Console.WriteLine((null == m.PhoneNumber));
m.Dial("5551212");
Console.WriteLine("5551212".Equals(m.PhoneNumber));
Console.WriteLine(0.Equals(m.SpeakerVolume));
m.SpeakerVolume = 10;
Console.WriteLine(10.Equals(m.SpeakerVolume));
Console.WriteLine("");
}