public class TrafficEvent
    {
        public string Url { get; set; }
        public string ContentType { get; set; }
        public byte[] Data { get; set; }
    }

    private List<TrafficEvent> trafficEvents;
    private Fiddler.SessionStateHandler responseHandler;

    private void HandleBeforeResponse(Fiddler.Session session)
    {
        trafficEvents.Add(new TrafficEvent
        {
            Url = session.fullUrl,
            ContentType = session.oResponse.headers.Exists("Content-Type") ? session.oResponse.headers["Content-Type"] : "",
            Data = session.responseBodyBytes
        });
    }

    public void StartFiddler()
    {
        trafficEvents = new List<TrafficEvent>();
        responseHandler = new Fiddler.SessionStateHandler(HandleBeforeResponse);
        Fiddler.FiddlerApplication.BeforeResponse += responseHandler;

        Fiddler.WinINETCache.ClearFiles();
        Fiddler.CONFIG.IgnoreServerCertErrors = false;

        int port = 8888;
        Fiddler.URLMonInterop.SetProxyInProcess("127.0.0.1:" + port.ToString(), "<-loopback>");
        Fiddler.FiddlerApplication.Startup(port, true, false);
    }

    public List<TrafficEvent> StopFiddler()
    {
        Fiddler.FiddlerApplication.BeforeResponse -= responseHandler;
        Fiddler.FiddlerApplication.Shutdown();
        return trafficEvents;
    }

    public async Task CaptureData(string url)
    {
        StartFiddler();

        var proc = Process.Start("chrome.exe", url);
        proc.EnableRaisingEvents = true;
        await Task.Delay(30 * 1000);
        proc.Kill();

        List<TrafficEvent> trafficEvents = StopFiddler();

        foreach (TrafficEvent trafficEvent in trafficEvents)
        {
            // Store event in database
        }
    }