async Task ExecuteRefreshCommand()
        {
            if (IsBusy)
            {
                return;
            }
            IsBusy = true;

            try
            {
                await CloudService.SyncOfflineCacheAsync();

                var table = await CloudService.GetTableAsync <Room>();

                var list = await table.ReadAllRoomsAsync();

                AllRooms.Clear();
                DisplayedRooms.Clear();
                foreach (var room in list)
                {
                    AllRooms.Add(room);
                    DisplayedRooms.Add(room);
                    SortRooms(DisplayedRooms, room);
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"[RoomListViewModel] Error loading items: {ex.Message}");
            }
            finally
            {
                IsBusy = false;
            }
        }
 void Search(String searchArgument)
 {
     if (searchArgument.Equals(""))
     {
         foreach (Room room in AllRooms)
         {
             DisplayedRooms.Add(room);
         }
     }
     else
     {
         DisplayedRooms.Clear();
         foreach (Room room in AllRooms)
         {
             if (room.Name.Contains(searchArgument) || room.Floor.Contains(searchArgument))
             {
                 DisplayedRooms.Add(room);
             }
         }
     }
 }