Products = new ObservableCollection<Product>(products);

ProductOptions =

new

ObservableCollection<ProductOption>(options);

 

ProductsView = CollectionViewSource.GetDefaultView(Products);

    

ProductsView.GroupDescriptions.Add(

new

PropertyGroupDescription(

"Group"

));

    

ProductsView.SortDescriptions.Add(

        

new

SortDescription(

"Name"

, ListSortDirection.Ascending));

 

ProductOptionsView = CollectionViewSource.GetDefaultView(ProductOptions);

    

ProductOptionsView.SortDescriptions.Add(

        

new

SortDescription(

"Option"

, ListSortDirection.Ascending));

 

<ListBox Grid.Row="1" ItemsSource="{Binding Products}"

DisplayMemberPath="Name">

<ListBox.GroupStyle>

<GroupStyle>

<GroupStyle.HeaderTemplate>

<DataTemplate>

<TextBlock Foreground="DarkGreen" Text="{Binding Name}"

FontStyle="Italic"/>

</DataTemplate>

</GroupStyle.HeaderTemplate>

</GroupStyle>

</ListBox.GroupStyle>