Program.cs

using PingRadar.Application.Diagnostics;
using PingRadar.Application.Relays;
using PingRadar.Infrastructure.Diagnostics;
using PingRadar.Infrastructure.Lifecycle;
using PingRadar.Infrastructure.Persistence;
using PingRadar.Infrastructure.Steam;
using PingRadar.Infrastructure.Updates;
using PingRadar.Presentation.Forms;

namespace PingRadar
{
    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            using var singleInstance = new WindowsSingleInstanceCoordinator();
            if (!singleInstance.IsPrimaryInstance)
            {
                singleInstance.SignalPrimaryInstance();
                return;
            }

            // To customize application configuration such as set high DPI settings or default font,
            // see https://aka.ms/applicationconfiguration.
            ApplicationConfiguration.Initialize();
            var settingsStore = new AppSettingsStore();
            var relayCatalog = new RelayCatalogService(new SteamRelayClient());
            var relayProbeService = new RelayProbeService(RelayProbeOptions.Default);
            var updateService = new GitHubUpdateService();
            var updateStateStore = new UpdateStateStore();
            var updateInstallerLauncher = new InnoUpdateInstallerLauncher();
            var updateSessionCoordinator = new UpdateSessionCoordinator();
            using var mainForm = new MainForm(
                settingsStore,
                relayCatalog,
                relayProbeService,
                updateService,
                updateStateStore,
                updateInstallerLauncher,
                updateSessionCoordinator);
            mainForm.Shown += (_, _) =>
                singleInstance.StartListening(() =>
                {
                    if (mainForm.IsDisposed || !mainForm.IsHandleCreated)
                    {
                        return;
                    }

                    try
                    {
                        _ = mainForm.BeginInvoke(
                            new Action(mainForm.ActivateExistingInstance));
                    }
                    catch (InvalidOperationException)
                    {
                        // The main window is already shutting down.
                    }
                });
            System.Windows.Forms.Application.Run(mainForm);
        }
    }
}