wabbajack/Wabbajack.App/Controls/LogView.axaml

<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"
             xmlns:controls="clr-namespace:Wabbajack.App.Controls"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="Wabbajack.App.Controls.LogView">
    <ScrollViewer ScrollChanged="ScrollViewer_OnScrollChanged" x:Name="ScrollViewer">
        <ItemsControl x:Name="Messages">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel></StackPanel>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <controls:LogViewItem></controls:LogViewItem>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
    </ScrollViewer>
</UserControl>