Programmatically Adding Permissions to a Folder

24down voteaccepted

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));