public DataSourcesInCode()
        {
            InitializeComponent();

            // Bind the category combo box to the category view
            // and show the products of the first category in the data grid.

            ClientView <Category> viewCategories = _scope.GetItems <Category>();

            comboBox1.DisplayMemberPath = "CategoryName";
            comboBox1.ItemsSource       = viewCategories;

            BindGrid(viewCategories.First().CategoryID);
        }