protected void FireViewModelNavigatedFromEvent(ViewModelBase viewModel, CrystalNavigationEventArgs args)
 {
     viewModel?.OnNavigatedFrom(viewModel, args);
 }
 protected void InvokeNavigatedEvent(CrystalNavigationEventArgs args)
 {
     Navigated?.Invoke(this, args);
 }
 protected void FireViewModelNavigatedToEvent(ViewModelBase viewModel, CrystalNavigationEventArgs args)
 {
     viewModel?.OnNavigatedTo(this, args);
 }
 internal NavigationServicePreNavigatedSignaledEventArgs(ViewModelBase viewModel, CrystalNavigationEventArgs e)
 {
     ViewModel      = viewModel;
     InnerEventArgs = e;
 }