async Task ExecuteLoadItemsCommand()
        {
            if (IsBusy)
            {
                return;
            }

            IsBusy = true;

            try
            {
                ItemsTodo.Clear();
                TimeLine = new DateTime();
                TimeLine = TimeLine.AddDays((WeekTimeLine * 7) - 1);
                var items = await ItemTodoDataStore.GetItemsTodoAsync(TimeLine, true);

                foreach (var item in items)
                {
                    ItemsTodo.Add(item);
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex);
            }
            finally
            {
                IsBusy = false;
            }
        }
        async Task ExecutePrevItemsCommand(int weektosearch)
        {
            if (IsBusy)
            {
                return;
            }

            IsBusy = true;

            try
            {
                ItemsTodo.Clear();
                TimeLine = new DateTime();
                if (WeekTimeLine <= 1)
                {
                    WeekTimeLine = 2;
                }
                TimeLine = TimeLine.AddDays(((WeekTimeLine - 1) * 7));
                var items = await ItemTodoDataStore.GetItemsTodoAsync(TimeLine, true);

                foreach (var item in items)
                {
                    ItemsTodo.Add(item);
                }
                if (WeekTimeLine <= 1)
                {
                    WeekTimeLine = 2;
                }
                else
                {
                    WeekTimeLine = WeekTimeLine - 1;
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex);
            }
            finally
            {
                IsBusy = false;
            }
        }