public CountDown(long totaltime, long interval, TextView txttimecounter, ICountdownInterface countdownInterface) : base(totaltime, interval)
{
this.txttimecounter = txttimecounter;
this.countdownInterface = countdownInterface;
}
public CountDown(ICountdownInterface countdownInterface) : base(0, 0)
{
this.countdownInterface = countdownInterface;
}