private async void PatientDeleteButton_Click(object sender, RoutedEventArgs e) { if (DoctorDataGrid.SelectedItem is Patient selectedItem) { if (await HttpHandler.DeletePatient(selectedItem.Id)) { DoctorDataGrid.Items.Remove(selectedItem); } } else { MessageBox.Show("Please select a patient", "Error", MessageBoxButton.OK, MessageBoxImage.Exclamation); } }