在WINUI3应用程序中，将数据绑定到ObservableCollection可能无法正常工作。这是由于ObservableCollection的实现方式与WINUI3的新UI元素库不兼容所致。为了解决这个问题，可以尝试使用XAML Behaviors库中的DataBind库。以下是一个示例代码：

XAML： interactivity:Interaction.Behaviors

C#： public class MainViewModel : INotifyPropertyChanged { public MainViewModel() { Items = new ObservableCollection(); }

private ObservableCollection _items;
public ObservableCollection Items
{
    get { return _items; }
    set { SetProperty(ref _items, value); }
}

// other properties and methods omitted for brevity

}

public class DataBindBehavior : Behavior { public static readonly DependencyProperty BindingProperty = DependencyProperty.Register(nameof(Binding), typeof(object), typeof(DataBindBehavior), new PropertyMetadata(default(object), BindingChanged));

public object Binding
{
    get { return GetValue(BindingProperty); }
    set { SetValue(BindingProperty, value); }
}

private static void BindingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    var behavior = (DataBindBehavior)d;
    if (behavior.AssociatedObject != null)
    {
        if (e.NewValue != null)
        {
            var binding = new Binding
            {
                Path = new PropertyPath("DataContext." + e.NewValue.ToString()),
                Mode = BindingMode.OneWay
            };
            behavior.AssociatedObject.SetBinding(ListViewBase.ItemsSourceProperty, binding);
        }
        else
        {
            behavior.AssociatedObject.ClearValue(ListViewBase.ItemsSourceProperty);
        }
    }
}

}