Proxy setup in C# (.NET)

A step-by-step guide to connecting Prokso proxies in C# (.NET). It takes a few minutes.

Step 1. Get the proxy details from your dashboard

Open your plan and copy the host gw.prokso.com, port, username and password. Port 823 is HTTP and 824 is SOCKS5 (both give a new IP for every request); ports 10000–20000 keep one IP (sticky session) for up to 120 minutes and work as both HTTP and SOCKS5 (each port is a separate address). Set the country in the username: username__cr.ua.

Step 2. Create a console project

You need .NET 6 or later: dotnet new console. HttpClient, WebProxy and NetworkCredential are built in, so no NuGet packages are required.

using System.Net;

var handler = new HttpClientHandler
{
    Proxy = new WebProxy("http://gw.prokso.com:823")
    {
        Credentials = new NetworkCredential("USERNAME", "PASSWORD")
    },
    UseProxy = true
};

using var client = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(30) };
Console.WriteLine(await client.GetStringAsync("https://api.ipify.org?format=json"));

Step 3. Set up a handler with the proxy

Create an HttpClientHandler, give it a WebProxy with the address http://gw.prokso.com:823, and pass the username and password as a NetworkCredential in the Credentials property. Put the code below into Program.cs.

Step 4. One HttpClient for the whole app

Create the client once and reuse it for all requests so connections to the proxy are reused. The proxy belongs to the handler, so a different port or country needs its own handler and its own client.

Step 5. SOCKS5 and a sticky IP

Since .NET 6, WebProxy accepts the address socks5://gw.prokso.com:824, and the username and password still come from Credentials. For a series of requests from one IP, use a sticky port from 10000-20000.

Step 6. If the connection fails

Check the host gw.prokso.com, the port and the scheme: HTTP on 823, SOCKS5 on 824, either one on ports 10000-20000. A 407 error means a wrong username or password, or the plan has run out of traffic: check the balance on the plan page in your dashboard. A timeout most often means a typo in the port or a client expecting a different protocol. If you use the IP whitelist, make sure the external address of the exact machine running the code is on the list.

Step 7. Check the output

Run the example: the program calls https://api.ipify.org and prints the IP the website sees. It should be the proxy's address, not yours. A 407 error means a wrong username or password, or the plan has run out of traffic. The My IP page in your browser won't help here: the browser goes direct.