[Linux] No Fields from xaml in Code Behind

Hello Everyone,

when I add a UserControl to my Avalonia Project, the Code Behind is created alongside the axaml but I can not access the controls from the Code Behind (as described here: https://docs.avaloniaui.net/docs/fundamentals/code-behind).

I can, however, create an eventHandler automatically.

Let me give you an Example:

<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="Todo.Helper.CustomControls.TestControl">
    
    <Button Name="greetingButton">Hello World</Button>
    
</UserControl>

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;

namespace Todo.Helper.CustomControls;

public partial class TestControl : UserControl
{
    public TestControl()
    {
        InitializeComponent();
        greetingButton.Content = "Goodbye Cruel World!";
    }
    
    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }
}

The greetingButton.Content is marked and I get the Error “Cannot resolve symbol ‘greetingButton’" and the application cannot be built.

Additionally I have to add the InitializeComponent() method manually, or the call gets marked. This has no effect on the application.

I use Bazzite and Rider has the Version 2026.2.1

Thank you in advance!