нажатие мерзавца heroku основное разрешение отклонено на VISTA

Можно скрыть почти весь код, реализованный интерфейсами к внешним блокам.

interface IVehicle
{
    void Drive();
    void Steer();
    void UseHook();
}
abstract class Vehicle  // :IVehicle  // Try it and see!
{
    /// <summary>
    /// Consuming classes are not required to implement this method.
    /// </summary>
    protected virtual void Hook()
    {
        return;
    }
}
class Car : Vehicle, IVehicle
{
    protected override void Hook()  // you must use keyword "override"
    {
        Console.WriteLine(" Car.Hook(): Uses abstracted method.");
    }
    #region IVehicle Members

    public void Drive()
    {
        Console.WriteLine(" Car.Drive(): Uses a tires and a motor.");
    }

    public void Steer()
    {
        Console.WriteLine(" Car.Steer(): Uses a steering wheel.");
    }
    /// <summary>
    /// This code is duplicated in implementing classes.  Hmm.
    /// </summary>
    void IVehicle.UseHook()
    {
        this.Hook();
    }

    #endregion
}
class Airplane : Vehicle, IVehicle
{
    protected override void Hook()  // you must use keyword "override"
    {
        Console.WriteLine(" Airplane.Hook(): Uses abstracted method.");
    }
    #region IVehicle Members

    public void Drive()
    {
        Console.WriteLine(" Airplane.Drive(): Uses wings and a motor.");
    }

    public void Steer()
    {
        Console.WriteLine(" Airplane.Steer(): Uses a control stick.");
    }
    /// <summary>
    /// This code is duplicated in implementing classes.  Hmm.
    /// </summary>
    void IVehicle.UseHook()
    {
        this.Hook();
    }

    #endregion
}

Это протестирует код.

class Program
{
    static void Main(string[] args)
    {
        Car car = new Car();
        IVehicle contract = (IVehicle)car;
        UseContract(contract);  // This line is identical...
        Airplane airplane = new Airplane();
        contract = (IVehicle)airplane;
        UseContract(contract);  // ...to the line above!
    }

    private static void UseContract(IVehicle contract)
    {
        // Try typing these 3 lines yourself, watch IDE behavior.
        contract.Drive();
        contract.Steer();
        contract.UseHook();
        Console.WriteLine("Press any key to continue...");
        Console.ReadLine();
    }
}