Program.cs

using Avalonia;
using Avalonia.ReactiveUI;
using System;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using Projektanker.Icons.Avalonia;
using Projektanker.Icons.Avalonia.FontAwesome;
using Velopack;

namespace NewRGB;

[SupportedOSPlatform(nameof(OSPlatform.Linux))]
[SupportedOSPlatform(nameof(OSPlatform.OSX))]
[SupportedOSPlatform(nameof(OSPlatform.Windows))]
internal sealed 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)
    {
        try
        {
            VelopackApp.Build().Run();
            BuildAvaloniaApp()
                .StartWithClassicDesktopLifetime(args);
        }
        catch (Exception e)
        {
            Console.Error.WriteLine(e);
            throw;
        }
    }

    // Avalonia configuration, don't remove; also used by visual designer.
    public static AppBuilder BuildAvaloniaApp()
    {
        IconProvider.Current
            .Register<FontAwesomeIconProvider>();

        return AppBuilder.Configure<App>()
            .UsePlatformDetect()
            .WithInterFont()
            .LogToTrace()
            .UseReactiveUI();
    }
}