如何在Csharp Datagrid和Entity Framework中显示外键值

public class Order
{
    public int OrderId { get; set; }
    public string OrderName { get; set; }

    public int CustomerId { get; set; }
    public virtual Customer Customer { get; set; }
}

public class YourDbContext : DbContext
{
    public DbSet<Order> Orders { get; set; }
    public DbSet<Customer> Customers { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Order>()
            .HasRequired(o => o.Customer)
            .WithMany()
            .HasForeignKey(o => o.CustomerId);
    }
}

<DataGrid ItemsSource="{Binding Orders}">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Order ID" Binding="{Binding OrderId}" />
        <DataGridTextColumn Header="Order Name" Binding="{Binding OrderName}" />
        <DataGridTextColumn Header="Customer" Binding="{Binding Customer.CustomerName}" />
    </DataGrid.Columns>
</DataGrid>