以下是一个示例代码，演示了如何将RightListBox和TextBox进行绑定：

XAML部分：

C#部分：

public partial class MainWindow : Window, INotifyPropertyChanged
{
    private ObservableCollection items;
    private Item selectedItem;

    public event PropertyChangedEventHandler PropertyChanged;

    public ObservableCollection Items
    {
        get { return items; }
        set
        {
            items = value;
            OnPropertyChanged(nameof(Items));
        }
    }

    public Item SelectedItem
    {
        get { return selectedItem; }
        set
        {
            selectedItem = value;
            OnPropertyChanged(nameof(SelectedItem));
        }
    }

    public MainWindow()
    {
        InitializeComponent();
        DataContext = this;

        Items = new ObservableCollection()
        {
            new Item() { Name = "Item 1", Description = "Description 1" },
            new Item() { Name = "Item 2", Description = "Description 2" },
            new Item() { Name = "Item 3", Description = "Description 3" }
        };
    }

    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class Item
{
    public string Name { get; set; }
    public string Description { get; set; }
}

这个示例中，ListBox绑定了一个ObservableCollection，其中Item有Name和Description两个属性。当选择ListBox中的项时，SelectedItem属性会更新为选定的项。TextBox绑定了SelectedItem的Description属性，因此当选定项更改时，TextBox中的文本将自动更新为选定项的Description值。