static void Main(string[] args)
{
var a1 = new A1();
var a2 = new A2();
var b = new B();
var b1 = new B1();
var b2 = new B2();
var b3 = new B2();
a1.Methode();
a2.Methode();
b.Methode();
b1.Methode();
b2.Methode();
b3.Methode();
Console.ReadKey();
}