/* Modify button click event
  */
 private void buttonModify_Click(object sender, RoutedEventArgs e)
 {
     if (dataGridTreatments.SelectedItems.Count > 0)
     {
         Content = new AddTreatment(((Treatment)dataGridTreatments.SelectedItem));
     }
 }
 /* Add button click event
  */
 private void buttonAdd_Click(object sender, RoutedEventArgs e)
 {
     Content = new AddTreatment(patient.HealthCareNo);
 }