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(); }