public static void Main(string[] args)
{
Shape s1 = new Rectangle("red", 4, 5);
Console.WriteLine (s1);
Console.WriteLine ("Area is " + s1.getArea());
Shape s2 = new Triangle("blue", 4, 5);
Console.WriteLine (s2);
Console.WriteLine ("Area is " + s2.getArea());
// Cannot create instance of an abstract class - Compilation Error!!
// Shape s3 = new Shape("green");
}
