private void QuestionnaireDetails_RefreshAll(object sender, EventArgs e)
 {
     FillData();
     this.DetailsContentControl.Content = null;
     questionnaireDetails = null;
 }
 private void AddButton_Click(object sender, RoutedEventArgs e)
 {
     questionnaireDetails = new QuestionnaireDetails(questionnaireService.ClientCredentials);
     questionnaireDetails.RefreshAll += QuestionnaireDetails_RefreshAll;
     DetailsContentControl.Content = questionnaireDetails;
 }
 private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
 {
     questionnaireDetails = new QuestionnaireDetails(questionnaireService.ClientCredentials, (Questionnaire)ListBox.SelectedItem);
     questionnaireDetails.RefreshAll += QuestionnaireDetails_RefreshAll;
     DetailsContentControl.Content = questionnaireDetails;
 }