static void Main(string[] args)
{
GenericDb <Shape> .Shapes.Add(new Circle()
{
Id = 1, Radius = 3
});
GenericDb <Shape> .Shapes.Add(new Rectangle()
{
Id = 2, SideA = 2, SideB = 2.5
});
Console.WriteLine("Area of the shapes:");
GenericDb <Shape> .PrintAreas();
Console.WriteLine("Perimeter of the shapes:");
GenericDb <Shape> .PrintPerimeters();
Shape circle = GenericDb <Shape> .Shapes[0];
circle.PrintInfo();
Shape rectangle = GenericDb <Shape> .Shapes[1];
rectangle.PrintInfo();
Console.ReadLine();
}