private static void InitializePolicyHierarchy ()
{
string machinePolicyPath = Path.GetDirectoryName (Environment.GetMachineConfigPath ());
// note: use InternalGetFolderPath to avoid recursive policy initialization
string userPolicyPath = Path.Combine (Environment.InternalGetFolderPath (Environment.SpecialFolder.ApplicationData), "mono");
PolicyLevel enterprise = new PolicyLevel ("Enterprise", PolicyLevelType.Enterprise);
_level = enterprise;
enterprise.LoadFromFile (Path.Combine (machinePolicyPath, "enterprisesec.config"));
PolicyLevel machine = new PolicyLevel ("Machine", PolicyLevelType.Machine);
_level = machine;
machine.LoadFromFile (Path.Combine (machinePolicyPath, "security.config"));
PolicyLevel user = new PolicyLevel ("User", PolicyLevelType.User);
_level = user;
user.LoadFromFile (Path.Combine (userPolicyPath, "security.config"));
ArrayList al = new ArrayList ();
al.Add (enterprise);
al.Add (machine);
al.Add (user);
_hierarchy = ArrayList.Synchronized (al);
_level = null;
}