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 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();
}
}