How to add a tool programatically? about dock HOT 2 CLOSED

public class CustomTool : Dock.Model.Avalonia.Controls.Tool
{
  private IPadContent _content;

  public CustomTool(IPadContent content)
  {
    _content = content ?? throw new ArgumentNullException(nameof(content));
    _content.PropertyChanged += EhContentPropertyChanged;
    this.Title = content.Title;
    this.Content = new Func<object, TemplateResult<Control>>((x) => new TemplateResult<Control>((Control)_content.ViewObject, null));
  }
  private void EhContentPropertyChanged(object? sender, PropertyChangedEventArgs e)
  {
    switch (e.PropertyName)
    {
      case "Title":
        this.Title = _content.Title;
        break;
      case "ViewObject":
        this.Content = _content.ViewObject;
        break;
    }
  }
}