private void ReferenceAdd_Button_Click(object sender, RoutedEventArgs e) { Window w = new Window(); Excel_referenceLoaderView e_ulv = new Excel_referenceLoaderView(); w.Width = 200; w.Height = 200; w.Content = e_ulv; if (w.ShowDialog() == true) { this.viewModel_.addReferenceInfoVM(e_ulv.SelectedReferenceVM_); } else { } //this.viewModel_.Excel_underlyingInfoViewModel_.Add(); }