static void Main(string[] args)
{
IBikeFactory factory = new SamFactory();
Body body = factory.CreateBody();
Wheel wheel = factory.CreateWheel();
Console.WriteLine(body.GetType());
Console.WriteLine(wheel.GetType());
factory = new GtFactory();
body = factory.CreateBody();
wheel = factory.CreateWheel();
Console.WriteLine(body.GetType());
Console.WriteLine(wheel.GetType());
}