GSS2Rework/GSS2.Test/App.axaml.cs

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

using GSS2.Test.ViewModels;

namespace GSS2.Test;

public partial class App : Application
{
    public override void Initialize()
    {
        AvaloniaXamlLoader.Load(this);
    }

    public override void OnFrameworkInitializationCompleted()
    {
        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            desktop.Startup += (_, _) => Program.ApplicationHost.RunAsync();
            desktop.Exit += (_, _) => Program.ApplicationHost.StopAsync();

            desktop.MainWindow = new MainWindow();
            desktop.MainWindow.Activated += (_, _) => desktop.MainWindow.DataContext = Program.ApplicationHost.Services.GetRequiredService<MainWindowViewModel>();
        }
        base.OnFrameworkInitializationCompleted();
    }
}