INTLanguages & Libraries

How to Use KnoxProxy with C# (HttpClient)

C# HttpClient with WebProxy support. Configure KnoxProxy in .NET applications using the built-in System.Net.Http namespace.

5 minutes setupVerified against C# (HttpClient) · Jul 2026 · .NET 8Language: C#

01Steps

Configure C# (HttpClient)

Create proxy handler

Configure HttpClientHandler with WebProxy.

csharp

var handler = new HttpClientHandler
{
    Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
    {
        Credentials = new NetworkCredential("USER", "PASS")
    },
    UseProxy = true
};

Create client

Initialize HttpClient with handler.

csharp

var client = new HttpClient(handler);

Make request

Send request through proxy.

csharp

var response = await client.GetStringAsync("https://httpbin.org/ip");
Console.WriteLine(response);

Country targeting

Add country to username.

csharp

Credentials = new NetworkCredential("USER-country-us", "PASS")

Test

Run and verify exit IP.

Dispose

Use IDisposable pattern.

csharp

using var client = new HttpClient(handler);

02Values

Copy-paste config

KnoxProxy.cs

using System.Net;
using System.Net.Http;

var handler = new HttpClientHandler
{
    Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
    {
        Credentials = new NetworkCredential("USER", "PASS")
    },
    UseProxy = true
};

using var client = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(30) };
var response = await client.GetStringAsync("https://httpbin.org/ip");
Console.WriteLine($"Exit IP: {response}");

// Country-targeted
handler.Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
{
    Credentials = new NetworkCredential("USER-country-de", "PASS")
};

Rotation config

HttpClient maintains connection pools. Create new HttpClientHandler instances for IP rotation, or use -session-{id} for explicit session control.

C# (HttpClient) integration troubleshooting guide
Problem	Fix
HttpRequestException: proxy tunnel failed	Verify NetworkCredential username and password.
TaskCanceledException	Increase client.Timeout.

Before you start

Prerequisites

.NET 6+ SDK

No NuGet packages needed

KnoxProxy account

Authentication

Auth method comparison

Username:Password (NetworkCredential)RecommendedBuilt into .NET. Credentials in code

IP AllowlistNo creds needed. Static IP

All routing lives in the username

Anatomy of the credential string

USER-country-de-city-berlin-session-profile07

country-de -- geo, firstcity-berlin -- optional city pinsession-profile07 -- unique per C# (HttpClient) profile

Order matters -- geo flags before the session flag. The session name is free text; use the profile ID so the mapping is self-documenting. Password stays as issued; no flags belong there. HTTP on :7000, SOCKS5 on :7001, same credentials.

Failure modes & fixes

HttpRequestException: proxy tunnel failed -- Auth failure.
TaskCanceledException -- Timeout.

Verify before you trust it

IP checker confirms country and ASN match your target
Response status is 200, not 403 or 407
No repeated timeouts on the first few requests
Rotation or stickiness behaves as configured

FAQ

C# (HttpClient) + KnoxProxy, answered

Should I use HttpClient or RestSharp?

HttpClient is built-in and recommended by Microsoft. RestSharp also supports proxies via RestClientOptions.Proxy = new WebProxy(...).

How do I use KnoxProxy with ASP.NET?

Does .NET support SOCKS5?

Yes in .NET 6+. Use WebProxy("socks5://gw.knoxproxy.com:7001") with NetworkCredential.

How do I avoid socket exhaustion?

Use IHttpClientFactory in ASP.NET or reuse HttpClient instances. Do not create new HttpClient per request.

RELMore integrations

Start using C# (HttpClient) with KnoxProxy

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Configure C# (HttpClient)

Create proxy handler

Configure HttpClientHandler with WebProxy.

csharp

var handler = new HttpClientHandler
{
    Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
    {
        Credentials = new NetworkCredential("USER", "PASS")
    },
    UseProxy = true
};

Create client

Initialize HttpClient with handler.

csharp

var client = new HttpClient(handler);

Make request

Send request through proxy.

csharp

var response = await client.GetStringAsync("https://httpbin.org/ip");
Console.WriteLine(response);

Country targeting

Add country to username.

csharp

Credentials = new NetworkCredential("USER-country-us", "PASS")

Test

Run and verify exit IP.

Dispose

Use IDisposable pattern.

csharp

using var client = new HttpClient(handler);

Copy-paste config

KnoxProxy.cs

using System.Net;
using System.Net.Http;

var handler = new HttpClientHandler
{
    Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
    {
        Credentials = new NetworkCredential("USER", "PASS")
    },
    UseProxy = true
};

using var client = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(30) };
var response = await client.GetStringAsync("https://httpbin.org/ip");
Console.WriteLine($"Exit IP: {response}");

// Country-targeted
handler.Proxy = new WebProxy("http://gw.knoxproxy.com:7000")
{
    Credentials = new NetworkCredential("USER-country-de", "PASS")
};

Rotation config

HttpClient maintains connection pools. Create new HttpClientHandler instances for IP rotation, or use -session-{id} for explicit session control.

C# (HttpClient) integration troubleshooting guide
Problem	Fix
HttpRequestException: proxy tunnel failed	Verify NetworkCredential username and password.
TaskCanceledException	Increase client.Timeout.

How to Use KnoxProxy with C# (HttpClient)

Configure C# (HttpClient)

Copy-paste config

Prerequisites

Auth method comparison

Anatomy of the credential string

Failure modes & fixes

Verify before you trust it

C# (HttpClient) + KnoxProxy, answered

Related tools

Start using C# (HttpClient) with KnoxProxy

How to Use KnoxProxy with C# (HttpClient)

Configure C# (HttpClient)

Copy-paste config

Prerequisites

Auth method comparison

Anatomy of the credential string

Failure modes & fixes

Verify before you trust it

C# (HttpClient) + KnoxProxy, answered

Related tools

Start using C# (HttpClient) with KnoxProxy