public HttpMessageHandler NativeHttpHandler
    {
      get
      {
        var host = JavaSystem.GetProperty(@"https.proxyHost");
        var port = JavaSystem.GetProperty(@"https.proxyPort");

        if (string.IsNullOrEmpty(host))
          return new HttpClientHandler();

        var proxyAddress = host;
        if (!string.IsNullOrEmpty(port)) proxyAddress = $@"{host}:{port}";

        var handler = new HttpClientHandler {Proxy = new WebProxy(proxyAddress), UseProxy = true};
        return handler;
      }
    }

    public HttpMessageHandler NativeHttpHandler
    {
      get
      {
        var handler = new NSUrlSessionHandler();
        return handler;
      }
    }