查找MarshalByRef对象的appdomain

我有一个编组的对象，它起源于另一个应用程序域。

是否有方法从对象本身获取对创建对象的应用程序域的引用

//i dont have a ref to this anymore.
AppDomain ad = AppDomain.CreateDomain("MyDomain");
MyRemoteObject r = (MyRemoteObject)ad.CreateInstanceFromAndUnwrap("MyCode.dll", "MyRemoteObject");
//is there a something such that i can re-discover the app domain
var appDomain = Something(r);