Fluent interfaces and leaky abstractions

Find.All.Questions(Where.IsAnswered == true);

m_Window = window::with()
	.width(l_Width)
	.height(l_Height)
	.title("default window")
	.left(200)
	.top(200)
.create();

::CreateWindow(
      "Window class",
      "Window title",
      dwStyle, X, Y,
      nWidth, nHeight,
      hWndPant, hMenu,
      hInstance, NULL
 );

public interface NotFluent
{
  void DoA();
  void DoB();
  void DoC();
}

public interface Fluent
{
  Fluent DoA();
  Fluent DoB();
  Fluent DoC();
}

NotFluent foo = new NotFluentImpl();
foo.DoA();
foo.DoB();
foo.DoC();

Fluent bar = new FluentImpl();
bar.DoA().DoB().DoC();

public City GetCity(string zipCode)
{
   zipCode.Assert("zipCode").IsNotNullOrEmpty().HasLength(5,10).Matches("\d[5]-\d[4]");
   // Continue processing
}

Car car = new CarImpl();
MarketingDescription des = new MarketingDescriptionImpl();
desc.setType("Box");
desc.setSubtype("Insulated");
desc.setAttribute("length", "50.5");
desc.setAttribute("ladder", "yes");
desc.setAttribute("lining type", "cork");
car.setDescription(desc);

Car car = Car.describedAs()
  .box()
  .length(50.5)
  .type(Type.INSULATED)
  .includes(Equipment.LADDER)
  .lining(Lining.CORK);