# Scrapfly publishes guide on using proxies with C# HttpClient

> Scrapfly released a blog post explaining how to configure authenticated and rotating proxies with C# HttpClient and SocketsHttpHandler, highlighting connection-pool pitfalls that cause 407 errors.

- Canonical: https://extractfeed.io/story/scrapfly-publishes-guide-on-using-proxies-with-c-httpclient-cf6a750/
- JSON: https://extractfeed.io/api/v1/stories/scrapfly-publishes-guide-on-using-proxies-with-c-httpclient-cf6a750.json
- Beat: Infrastructure & Proxies · Evidence: Primary source · Type/significance: analysis/2 · First seen: 2026-10-16T23:47:39.738491+00:00 · Updated: 2026-10-16T23:47:39.738491+00:00 · Edition: 2026-11-05
- Framing: model-written (headline, standfirst, why it matters, tags); source facts deterministic

## Briefing
- Scrapfly: Scrapfly released a blog post explaining how to configure authenticated and rotating proxies with C# HttpClient and SocketsHttpHandler, highlighting connection-pool pitfalls that cause 407 errors.

## Why it matters
This tutorial addresses a common pain point for .NET developers working with web scraping and proxy infrastructure. By detailing the connection-pool traps behind 407 errors, it helps practitioners avoid silent failures and improve proxy rotation reliability in production scraping pipelines.

## Sources
- Primary source · Scrapfly · 2026-10-16 — [How to Use a Proxy With C\# HttpClient in 2026](https://scrapfly.io/blog/posts/csharp-httpclient-proxy)

## Watch next
Will Scrapfly release similar guides for other popular HTTP client libraries like Python's httpx or Node.js undici?

Topics: Scrapfly, C# HttpClient, SocketsHttpHandler, csharp, httpclient, proxy-configuration, web-scraping, connection-pooling

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