public async Task Update_List_On_OnDeleteAsync()
{
var dbContext = HelperClass.CreateInMemoryDB(HelperClass.CreateItems());
CalendarRepository calendarRepository = new CalendarRepository(dbContext);
CalendarViewModel viewModel = new CalendarViewModel(calendarRepository, null);
var items = viewModel.SelectedEntrie;
Assert.Equal(3, viewModel.CalendarEntries.Count);
await viewModel.DeleteEntrieAsync();
Assert.Equal(2, viewModel.CalendarEntries.Count);
}
