static void Main(string[] args) { DisArea dis = new DisArea(5); ISquare sq = (ISquare)dis; //强制类型转换 ICircle ci = (ICircle)dis; //强制类型转换 Console.WriteLine("正方形的面积是:" + sq.Area()); //显式接口成员只能通过接口实例访问 Console.WriteLine("圆形的面积是:" + ci.Area()); Console.ReadKey(); }
public IActionResult Index() { var circle = new CircleDTO { Radius = _circle.Radius, Area = _circle.Area(), Perimeter = _circle.Perimeter() }; return(View(circle)); }