public async void DeleteVenue() { if (selectedVenue.Id != 0) { await managerService.DeleteVenueAsync(selectedVenue.Id); await managerService.GetAllVenuesAsync(); LayoutsByVenueId = null; SeatsByAreaId = null; AreasByLayoutId = null; } else { windowManager.ShowDialog(new ErrorViewModel(MyResources.SelectVenueMsg)); } }