AttachedToVisualTree or Loaded on UserControl gives Invalid Markup

[Dakar2008Inropa]

Describe the bug

When trying to use AttachedToVisualTree or Loaded on a UserControl element it gives an Invalid Markup in the axaml designer.

To Reproduce

<UserControl xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450" x:Class="AvaloniaPad.MainView" Name="MainViewUC" Loaded="UserControl_Loaded"></UserControl>

Expected behavior

No response

Avalonia version

11.1.3

OS

Windows

Additional context

No response

[workgroupengineering]

The known issue has been fixed in 11.2-beta1.

Workaround, add the code as follows to your user control

    public static void AddLoadedHandler(Interactive element, EventHandler<RoutedEventArgs> handler)
    {
        element.AddHandler(LoadedEvent, handler);
    }