I am doing something wrong, I just don't know what.

[Rickrat]

It will start the proxy then later it will stop it but nothing happens in-between. Here's my code below.

```
proxyServer = new ProxyServer();
proxyServer.ForwardToUpstreamGateway = true;
explicitEndPoint = new ExplicitProxyEndPoint(IPAddress.Any, 8024, true);

proxyServer.BeforeRequest += OnRequest;
proxyServer.BeforeResponse += OnResponse;
proxyServer.ServerCertificateValidationCallback += OnCertificateValidation;
explicitEndPoint.BeforeTunnelConnectRequest += OnBeforeTunnelConnectRequest;

proxyServer.AddEndPoint(explicitEndPoint);
proxyServer.Start();

// ---

explicitEndPoint.BeforeTunnelConnectRequest -= OnBeforeTunnelConnectRequest;
proxyServer.BeforeRequest -= OnRequest;
proxyServer.BeforeResponse -= OnResponse;
proxyServer.ServerCertificateValidationCallback -= OnCertificateValidation;
proxyServer.ClientCertificateSelectionCallback -= OnCertificateSelection;

proxyServer.Stop();

[justcoding121]

Looking at the snippet ? you start the proxy and then immediately unsubscribe + Stop(). Nothing can happen in between because the process never stays running long enough to accept traffic.

You need to keep the proxy alive, and point your client at it. Minimal idea:

var proxyServer = new ProxyServer();
var explicitEndPoint = new ExplicitProxyEndPoint(IPAddress.Any, 8024, true);

proxyServer.BeforeRequest += OnRequest;
proxyServer.BeforeResponse += OnResponse;
explicitEndPoint.BeforeTunnelConnectRequest += OnBeforeTunnelConnectRequest;

proxyServer.AddEndPoint(explicitEndPoint);
proxyServer.Start();

// optional: set system proxy for this machine
proxyServer.SetAsSystemHttpProxy(explicitEndPoint);
proxyServer.SetAsSystemHttpsProxy(explicitEndPoint);

Console.WriteLine("Listening on 8024 ? press Enter to stop");
Console.ReadLine();

proxyServer.Stop();

Also make sure the browser/app is actually using 127.0.0.1:8024 (or system proxy if you set that). ForwardToUpstreamGateway only matters if you already have another upstream proxy.

Closing ? reopen if it's still quiet after leaving it running.