Programmatically Adding Permissions to a Folder

Question

I have an issue where I need to add give access to a folder for all authenticated users to store application related settings. I have found that this can be done with the below

Answer 1

I'd suggest you use the Well Known SID list (see http://support.microsoft.com/kb/243330). Authenticated User is always SID: S-1-5-11. If you use that, it ought to be language agnostic (but I've not tested).

Create a SecurityIdentifier and use that instead:

var sid = new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null); 

Security.AddAccessRule(
   new FileSystemAccessRule(
       sid,
       FileSystemRights.Modify,
       InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
       PropagationFlags.None,
       AccessControlType.Allow));