PresenceApp/Presence.Desktop/Program.cs

using Avalonia;
using Avalonia.ReactiveUI;
using Presence.Desktop.ViewModels;
using System;

namespace Presence.Desktop
{
    internal sealed class Program
    {
        [STAThread]
        public static void Main(string[] args) => BuildAvaloniaApp()
            .StartWithClassicDesktopLifetime(args);

        public static AppBuilder BuildAvaloniaApp()
            => AppBuilder.Configure<App>()
                .UsePlatformDetect()
                .WithInterFont()
                .LogToTrace()
                .UseReactiveUI();
    }
}