title: How can I get all users in a local group (with good performance)
body: <p>I looking for a solution for quite while but all solutions I found are very slow.
  I want to get all users in local windows group. This group can of course also contain AD groups. So the result should contain all users that are members of the group itself <strong>and</strong> the users of the AD groups that are contained.
  Do you know a solution for this with a good performance?</p>