Avalonia/samples/AppWithoutLifetime/Program.cs

using Avalonia;
using Avalonia.Controls;
using System;

namespace AppWithoutLifetime;

class Program
{
    // Initialization code. Don't use any Avalonia, third-party APIs or any
    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
    // yet and stuff might break.
    [STAThread]
    public static void Main(string[] args)
    {
        BuildAvaloniaApp().Start(AppMain, args);
    }

    private static void AppMain(Application app, string[] args)
    {
        app.Run(new MainWindow());
    }

    // Avalonia configuration, don't remove; also used by visual designer.
    public static AppBuilder BuildAvaloniaApp()
        => AppBuilder.Configure<App>()
            .UsePlatformDetect()
            .WithDeveloperTools()
            .LogToTrace();
}