static void UsePhone(PhoneInterface phone)
{
phone.MakeCall();
phone.HangUp();
//calls OpenDoor if a PhoneBooth
try
{
PhoneBooth tester = (PhoneBooth)phone;
tester.OpenDoor();
}
catch
{
}
//calls TimeTravel if Tardis
try
{
Tardis tester = (Tardis)phone;
tester.TimeTravel();
}
catch
{
}
}
static void Main(string[] args)
{
Tardis tard = new Tardis();
PhoneBooth pb = new PhoneBooth();
UsePhone(tard);
UsePhone(pb);
}
static void Main(string[] args)
{
Tardis myTardis = new Tardis();
PhoneBooth myBooth = new PhoneBooth();
UsePhone(myBooth);
UsePhone(myTardis);
}
static void UsePhone(object obj)
{
PhoneInterface MyInterface = (PhoneInterface)obj;
MyInterface.MakeCall();
MyInterface.HangUp();
if (obj.Equals(typeof(PhoneBooth)))
{
PhoneBooth myBooth = (PhoneBooth)obj;
myBooth.openDoor();
}
if (obj.Equals(typeof(Tardis)))
{
Tardis mytardis = (Tardis)obj;
mytardis.TimeTravel();
}
}
