Program.cs

using Avalonia;
using System;
using ImvixPro.Services;

namespace ImvixPro
{
    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)
        {
            using var singleInstance = new SingleInstanceService(AppIdentity.InternalName);
            if (!singleInstance.IsFirstInstance)
            {
                singleInstance.SignalExistingInstance(args);
                return;
            }

            App.SingleInstance = singleInstance;
            PreviewOcrService.WarmUpRuntime();
            PreviewQrService.WarmUpRuntime();
            PreviewBarcodeService.WarmUpRuntime();
            BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
        }

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