<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
 <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                       Source="{Binding Source={x:Static Application.Current}, Path=Products}" >

         <xcdg:DataGridCollectionViewSource.ItemProperties>
            <xcdg:DataGridItemProperty Name="CategoryID"
                                       Title="Category">
               <xcdg:DataGridItemProperty.ForeignKeyDescription>
                  <xcdg:DataTableForeignKeyDescription ItemsSource="{Binding Source={x:Static Application.Current}, Path=Categories}"
                                                       ValuePath="CategoryID"
                                                       DisplayMemberPath="CategoryName" />
               </xcdg:DataGridItemProperty.ForeignKeyDescription>
            </xcdg:DataGridItemProperty>

            <xcdg:DataGridItemProperty Name="SupplierID"
                                       Title="Supplier">
               <xcdg:DataGridItemProperty.ForeignKeyDescription>
                  <xcdg:DataTableForeignKeyDescription ItemsSource="{Binding Source={x:Static Application.Current}, Path=Suppliers}"
                                                       ValuePath="SupplierID"
                                                       DisplayMemberPath="CompanyName" />
               </xcdg:DataGridItemProperty.ForeignKeyDescription>
            </xcdg:DataGridItemProperty>
         </xcdg:DataGridCollectionViewSource.ItemProperties>

      </xcdg:DataGridCollectionViewSource>
 </Grid.Resources>      

 <xcdg:DataGridControl x:Name="OrdersGrid"
                       ItemsSource="{Binding Source={StaticResource cvs_orders}}"
                       AutoCreateForeignKeyConfigurations="True"/>
</Grid>