C＃。窗口服务。内存泄漏

请告诉我我在哪里犯了错误，该服务正在逐渐消耗内存

该服务在启动时的任务是逐行加载 Services.txt 文件中的地址，List<Uri>并在一定时间间隔后对文件中的每个 URL 发出 GET 请求

程序.cs

static class Program
{
    static void Main()
    {
        ServiceBase[] ServicesToRun = {
            new ServicePusher()
        };

        ServiceBase.Run(ServicesToRun);
    }
}

ServicePusher.cs

public partial class ServicePusher : ServiceBase
{
    private static readonly Logger Log = LogManager.GetCurrentClassLogger();
    private Timer ServiceTimer;
    private readonly List<Uri> ServiceUrl = new List<Uri>();

    public ServicePusher()
    {
        InitializeComponent();
    }

    protected override void OnStart(string[] args)
    {
        if (!File.Exists(AppDomain.CurrentDomain.BaseDirectory + "/Services.txt"))
        {
            Log.Error("Не найден Services.txt");
            throw new FileNotFoundException("Не найден Services.txt");
        }

        using (StreamReader sr = new StreamReader(AppDomain.CurrentDomain.BaseDirectory + "/Services.txt"))
        {
            string line;

            while ((line = sr.ReadLine()) != null)
            {
                Uri serviceUri = null;

                try
                {
                    serviceUri = new Uri(line);
                }
                catch (Exception ex)
                {
                    Log.Error($"Ошибка при получении адреса сервиса ({line}): {ex}");
                }

                if (serviceUri != null)
                {
                    ServiceUrl.Add(serviceUri);
                }
                else
                {
                    Log.Error($"Некорректный адрес сервиса ({line}) в файле Services.txt");
                }
            }
        }

        ServiceTimer = new Timer
        {
            Interval = Config.Interval
        };

        ServiceTimer.Elapsed += Tick;
        ServiceTimer.AutoReset = true;
        ServiceTimer.Start();


        Log.Info("Сервис успешно запущен");
        Log.Info($"Загружено сервисов: {ServiceUrl.Count}");
    }

    protected override void OnStop()
    {
        ServiceTimer.Stop();
        ServiceTimer.Dispose();
        ServiceTimer = null;

        Log.Info("Сервис остановлен");
    }

    private void Tick(object sender, ElapsedEventArgs e)
    {
        try
        {
            foreach (Uri url in ServiceUrl)
            {
                ServicePointManager.ServerCertificateValidationCallback = (o, a, b, c) => true;

                WebRequest request = WebRequest.Create(url);
                request.Proxy = null;
                request.Method = "GET";
                request.Timeout = 360000;
                request.ContentType = "application/x-www-form-urlencoded";

                try
                {
                    using (WebResponse response = request.GetResponse())
                    {
                        using (Stream requestStream = response.GetResponseStream())
                        {
                            if (requestStream == null)
                            {
                                Log.Error($"Нет ответа от {url}");
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    Log.Error($"Ошибка ({ex.Message}) при запросе к сервису {url}");
                }
            }
        }
        catch (Exception ex)
        {
            Log.Error(ex.Message);
        }
    }
}

UPD：每小时消耗约 2 MB

UPD 2：更新问题中的代码，15分钟稳吃~350 kb ...

也许它在Program.cs中？