private string PermissionPrefix(FBUserOrFriends ForWhom)
 {
     return ((FBUserOrFriends.USER == ForWhom) ? "user_" : "friends_");
 }
 private string GetPermissionString(FBUserOrFriends ForWhom, FBUserAndFriendPermissions Perm)
 {
     if (FBUserAndFriendPermissions.EMAIL == Perm)
     {
         Debug.Assert(FBUserOrFriends.USER == ForWhom);
         return System.Enum.GetName(typeof(FBUserAndFriendPermissions), Perm).ToLower();
     }
     else
     {
         return PermissionPrefix(ForWhom) + System.Enum.GetName(typeof(FBUserAndFriendPermissions), Perm).ToLower();
     }
 }