Libation/Source/HangoverAvalonia/App.axaml.cs

using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using HangoverAvalonia.ViewModels;
using HangoverAvalonia.Views;

namespace HangoverAvalonia;

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

	public override void OnFrameworkInitializationCompleted()
	{
		if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
		{
			var mainWindow = new MainWindow
			{
				DataContext = new MainVM(),
			};
			desktop.MainWindow = mainWindow;
			mainWindow.OnLoad();
		}

		base.OnFrameworkInitializationCompleted();
	}
}