/// <summary>
 /// Creator : Thomas Dupuy
 /// Created: 2/21/2020
 /// Approver: Austin Gee
 ///
 /// This method is called when the view appointments tab is loaded
 /// </summary>
 ///
 /// <remarks>
 /// Updater:
 /// Updated:
 /// Update:
 /// </remarks>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void DgAppointmentList_Loaded(object sender, RoutedEventArgs e)
 {
     try
     {
         dgAppointmentList.ItemsSource = _appointmentManager.RetrieveAllActiveAppointments();
     }
     catch (Exception)
     {
         WPFErrorHandler.ErrorMessage("Could not retrieve data.");
     }
 }