Which code_group applies to my app?

[ambidexterous]

1)
How do i find out which code group iz my app running under.

I tried the SecurityManager.GetZoneAndOrigin but it
var zone = new ArrayList();
var origin = new ArrayList();
SecurityManager.GetZoneAndOrigin(out zone, out origin);
but the lists are not populated, ie both of them have .Count == 0

I created my custom code group and made a membership condition : hash and
then i used import and choosed my app

onw i want to make sure that this thing really works and my app is running
under my custom code group

2)

How do i know wether Role based security prevented app to access some
resources or CAS security prevented the access?