public AutomaticOffTimer(ILightBulb bulb)
{
mBulb = bulb;
}
public LightSwitch(ILightBulb lightBulb)
{
this.lightBulb = lightBulb;
}
public static void SwitchOn(this ILightBulb lightBulb, TimeSpan offAfter)
{
var timer = new AutomaticOffTimer(lightBulb);
timer.Run(offAfter);
}
