private void BuyFuel() { if (MyShip.GetFuelLevel() < MyShip.GetFuelCapacity()) { Cargo.ChangeCredits(-75); MyShip.ChangeFuel(250); // fuel capacity enforced within Ship.ChangeFuel() Console.Clear(); Console.WriteLine("Fuel purchased."); } else { Console.Clear(); Console.WriteLine("You're tank is full"); } Console.WriteLine($"Credits = {Cargo.GetCredits()}"); Console.WriteLine($" Fuel = {MyShip.GetFuelLevel()}/{MyShip.GetFuelCapacity()}"); }