public virtual void stopWorking()
{
Console.WriteLine(this.GetType() + "_" + this.GetHashCode() + ": " + System.Reflection.MethodBase.GetCurrentMethod().Name + "()");
currentMode = null;
}
public virtual void startWorking(Service service)
{
Console.WriteLine(this.GetType() + "_" + this.GetHashCode() + ": " + System.Reflection.MethodBase.GetCurrentMethod().Name + "()");
currentMode = (VendingMachineMode)modes[service];
currentMode.turnOn();
}