多级类属性赋值（报文）

class B {
        private int x;
        public int X {
            get { return x; }
            set { x = value; }
        }
    }
class A {
        private B _b;
        public B b {
            get { return _b; }
            set { _b = value; }
        }
    }

static void Main(string[] args) {
            A a = new A();
            B b = new B();
            b.X = 1000;
            a.b = b;

            Type t = a.GetType();
            PropertyInfo propinfo=t.GetProperty("b");

            object o = t.InvokeMember("b", BindingFlags.GetProperty, null, a, null);

            if (o != null) {
                PropertyInfo propinfo2 = o.GetType().GetProperty("X");
                propinfo2.SetValue(o, 1000000, null);
                propinfo.SetValue(a, o, null);
            }
            SetValue(a, "b.X", 1233);
            Console.Write(a.b.X);
            Console.ReadLine();            
        }