internal static void Run()
        {
            var a = new N1.A();
            var b = new N1.N2.B();
            var c = new N1.N2.C();

            a.Dump(); //for test
            b.Dump();
            c.Dump();
        }
 static void Main(string[] args)
 {
     var a = new N1.A();
     var b = new N1.N2.B();
     var c = new N1.N2.C();
 }