public interface ITransportCore
{
    void BeeBeeMotherfucker();
}

public interface ITaxi
{
    void Drive(bool playNightcallTheme);
}

public class Taxi : ITransportCore, ITaxi
{
    private ITransport _core;

    public Taxi(ITransportCore core)
    {
        _core = core;
    }

    // ITransportCore & ITaxi realization
}

public interface IBigTaxi
{
    void Drive(int weight);
}

public class BigTaxi : ITransportCore, IBigTaxi
{
    private ITransport _core;

    public Taxi(ITransportCore core)
    {
        _core = core;
    }

    // ITransportCore & IBigTaxi realization
}