public string Land(AerialVehicle a)
{
if (Vehicles.Count() < MaxVehicles)
{
a.FlyDown(a.CurrentAltitude);
Vehicles.Add(a);
return(string.Format($"{a.GetType()} has landed."));
}
return(string.Format($"Airport {AirportCode} is full."));
}
public string TakeOff(AerialVehicle a)
{
a.TakeOff();
Vehicles.RemoveAt(-1);
return(string.Format($"{this.GetType()} has taken off."));
}