virtual interface implementation

using System;//  ja  va2  s  . c  om
interface Printable{
    void print();
}

class Shape : Printable{
   public virtual void print(){
     Console.WriteLine("shape");
   }
}

class Rectangle : Shape{
   public override void print(){
     Console.WriteLine("rectangle");
   }
}


class Test
{
    static void Main()
    {

        Shape s = new Shape();
        s.print();

        Rectangle r = new Rectangle();
        r.print();

    }
}