From now on, use asterisk instead of a dot as an unknown property placeholder when defining PropertyDefinition.Path to specify a path to a nested object's properties.

To only show the ListBox.Items collection and the Content property for each item in the collection in a PropertyGridControl, do the following:

1. Set the ShowProperties option to WithPropertyDefinitions.
2. Define a CollectionDefinition with the Path set to 'Items'.
3. Define a PropertyDefinition with the Path set to '*.Content'. The asterisk character '*' identifies an indexer [] that does not have a constant name. The path to nested properties is different for different collection items: '[0].Content', '[1].Content', etc.
   The following example illustrates a PropertyGridControl bound to a ListBox control.

<para><code lang="xaml"> <dxprg:PropertyGridControl ShowProperties="WithPropertyDefinitions">
            <dxprg:PropertyGridControl.SelectedObject>
                <ListBox>
                    <ListBox.Items>
                        <ListBoxItem Content="First"/>
                        <ListBoxItem Content="Second"/>
                    </ListBox.Items>
                </ListBox>
            </dxprg:PropertyGridControl.SelectedObject>
            <dxprg:CollectionDefinition Path="Items">
                <dxprg:PropertyDefinition Path="*.Content"/>
            </dxprg:CollectionDefinition>
        </dxprg:PropertyGridControl>