Property

Name
DisplayMode
InnerContent
SidebarContent
Footer
IsPaneOpen
OpenPaneLength
NegativeOpenPaneLength
SelectedItem
MenuItemsSource

Events

Name
ItemInvoked
ItemContextInvoked
ItemDragOver
ItemDropped

ISidebarItemModel

Property

Name
Children
IconSource
ItemDecorator
IsExpanded
Text
ToolTip
PaddedItem

Example

 <dev:SidebarView MenuItemsSource="{x:Bind SidebarViewItems, Mode=OneWay}" />

public partial ObservableCollection<FolderItem> SidebarViewItems { get; set; } = new ObservableCollection<FolderItem>()
{
        new FolderItem()
    {
        FolderText = "Home",
        Path = "C:\\Fonts",
        Icon = new ImageIconSource()
        {
            ImageSource = new BitmapImage(new Uri("ms-appx:///Assets/Fluent/Home.png"))
        }
    },
    new FolderItem()
    {
        FolderText = "Folder",
        Path = "C:\\Folder",
        IsExpanded = true,
        Icon = new ImageIconSource()
        {
            ImageSource = new BitmapImage(new Uri("ms-appx:///Assets/Fluent/Folder.png"))
        },
        Children = new ObservableCollection<FolderItem>()
        {
            new FolderItem()
            {
                FolderText = "SubFolder1",
                Path = "C:\\Folder\\SubFolder1",
                Icon = new ImageIconSource()
                {
                    ImageSource = new BitmapImage(new Uri("ms-appx:///Assets/Fluent/Folder.png"))
                }
            },
            new FolderItem()
            {
                FolderText = "SubFolder2",
                Path = "C:\\Folder\\SubFolder2",
                Icon = new ImageIconSource()
                {
                    ImageSource = new BitmapImage(new Uri("ms-appx:///Assets/Fluent/Folder.png"))
                }
            }
        }
    },
    new FolderItem()
    {
        FolderText = "Drive",
        Path = "D:\\Drive",
        Icon = new ImageIconSource()
        {
            ImageSource = new BitmapImage(new Uri("ms-appx:///Assets/Fluent/CloudDrive.png"))
        }
    },
};

if you are using MVVM and ObservableObject you can use:

public sealed partial class FolderItem : ObservableObject, ISidebarItemModel
{
    [ObservableProperty]
    public partial string FolderText { get; set; } = "";

    [ObservableProperty]
    public partial string Path { get; set; } = "";

    [ObservableProperty]
    public partial ImageIconSource Icon { get; set; } = new ImageIconSource();

    public object? Children { get; set; } = null;

    public IconSource? IconSource => Icon;

    public bool IsExpanded { get; set; } = false;

    public object ToolTip => Path;

    public bool PaddedItem => false;

    public string Text => FolderText;

    partial void OnIconChanged(ImageIconSource value)
    {
        // Notify that IconSource also changed when Icon changes
        OnPropertyChanged(nameof(IconSource));
    }
}

or if you prefer regular INotifyPropertyChanged you can use:

public sealed partial class FolderItem : ISidebarItemModel, INotifyPropertyChanged
{
    private string text = "";
    public string Text
    {
        get => text;
        set => SetProperty(ref text, value, nameof(Text));
    }

    private string path = "";
    public string Path
    {
        get => path;
        set => SetProperty(ref path, value, nameof(Path));
    }

    private ImageIconSource icon = new ImageIconSource();
    public ImageIconSource Icon
    {
        get => icon;
        set
        {
            SetProperty(ref icon, value, nameof(Icon));
            OnPropertyChanged(nameof(IconSource));
        }
    }

    public object? Children { get; set; } = null;

    public IconSource? IconSource => Icon;

    public bool IsExpanded { get; set; } = false;

    public object ToolTip => Path;

    public bool PaddedItem => false;

    public event PropertyChangedEventHandler? PropertyChanged;

    private void OnPropertyChanged(string propertyName)
        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

    private bool SetProperty<T>(ref T storage, T value, string propertyName)
    {
        if (Equals(storage, value)) return false;
        storage = value;
        OnPropertyChanged(propertyName);
        return true;
    }
}

Demo

you can run demo and see this feature.