c#简单工厂、工厂方法与抽象工厂的区别分析

public class BMWCar : ICar
{
    public void run()
    {
        Console.WriteLine("BMWCar run");
    }
}

public class BenzCar : ICar
{
    public void run()
    {
        Console.WriteLine("BenzCar run");
    }
}

public class Driver
{
    public static ICar DriverCar(string carType)
    {
        switch (carType)
        {
            case "BMWCar": return new BMWCar();
            case "BenzCar": return new BenzCar();
            default: throw new Exception();
       }
    }
}

public class Client
{
    public static void Main()
    {
        ICar myCar = Driver.DriverCar("BenzCar");
        myCar.run();
        Console.Read();
    }
}

public class BMWCar : ICar
{
    public void run()
    {
        Console.WriteLine("BMWCar run");
    }
}

public class BenzCar : ICar
{
    public void run()
    {
        Console.WriteLine("BenzCar run");
    }
}
public abstract class Driver
{
    public abstract ICar DriverCar();
}

public class BMWDriver : Driver
{
    public override ICar  DriverCar()
    {
        return new BMWCar();
    }

}
public class BenzDriver : Driver
{
    public  override ICar DriverCar()
    {
        return new BenzCar();
    }
}

class Client
{
    public static void Main()
    {
        Driver myDriver = new BenzDriver();
        ICar myCar = myDriver.DriverCar();
        myCar.run();
        Console.Read();
    }
}

public interface IBusinessCar
{
    void run();
}

public interface ISportCar
{
void run();
}

public class BMWBusinessCar : IBusinessCar
{
    public void run()
    {
        Console.WriteLine("BMWCar run");
    }

}

public class BenzBusinessCar : IBusinessCar
{
    public void run()
    {
        Console.WriteLine("BenzBusinessCar run");
    }
}

public class BMWSportCar:ISportCar
{
public void run()
{
Console.WriteLine("BMWSportCar run");
}
}

public class BenzSportCar:ISportCar
{
public void run()
{

Console.WriteLine("BenzSportCar run");
}
}

public interface IDriver
{
IBusinessCar BusinessCarDriver();
ISportCar SportCarDriver();
}

public class BMWDriver:IDriver
{
public IBusinessCar BusinessCarDriver()
{
return new BMWBusinessCar();
}
public ISportCar SportCarDriver()
{
return new BMWSportCar();
}
}

public class BenzDriver:IDriver
{
public IBusinessCar BusinessCarDriver()
{
return new BenzBusinessCar();
}

public ISportCar SportCarDriver()
{
return new BenzSportCar();
}
}

class Client
{
    public static void Main()
    {
        IDriver myDriver =new BenzDriver();
        ISportCar myCar = myDriver.SportCarDriver();
        myCar.run();
        Console.Read();
    }

}