Wiring up the customer list box

Now, we need to make the tabs dynamic and wire them up to the customer list box. To do this follow these steps:

1. Update MainWindow.xaml as follows:

       </Expander.Header>
       <StackPanel>
           <ListBox ItemsSource="{Binding Customers}" 
                       DisplayMemberPath="CompanyName"
                       SelectedValuePath="CustomerID"
                       VerticalAlignment="Top"
                       SelectedValue
   ="{Binding 
                           SelectedCustomerID}"
                       Height="180"
                       Width="250" />
           <ContentControl Margin="0, 3">
               <Hyperlink Click="Hyperlink_Click">
                   <TextBlock Text="Show Details" />
               </Hyperlink>
           </ContentControl>
       </StackPanel>                    
   </Expander>

2. Add a using statement for Northwind.ViewModel in MainWindow.xaml.cs.

3. Add the following function to MainWindow in MainWindow.xaml.cs...