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title: How to Ping an endpoint with C# | daily.dev
description: A practical guide explains how to check if a remote endpoint is reachable in C#, contrasting a naive HttpClient HEAD-request approach (which fails for...
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og:description: A practical guide explains how to check if a remote endpoint is reachable in C#, contrasting a naive HttpClient HEAD-request approach (which fails for...
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# How to Ping an endpoint with C#

**[Code4IT](https://daily.dev/sources/code4it)** · 6 min read · 0 upvotes · 0 comments

## Summary

A practical guide explains how to check if a remote endpoint is reachable in C#, contrasting a naive HttpClient HEAD-request approach (which fails for authenticated sites or APIs without a root endpoint) with the built-in Ping class from System.Net.NetworkInformation. It walks through using SendPingAsync, reading PingReply properties like Status, RoundtripTime, and Address, notes the synchronous Send method, and shows how to extract a hostname from a full URL using System.Uri. It also flags that Azure App Service does not support ping.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.code4it.dev/blog/ping-endpoint-csharp>

## Questions this post answers

### How do I check if an endpoint is reachable in C# without using HttpClient?

Use the Ping class from System.Net.NetworkInformation instead of HttpClient. Create a new Ping object and call SendPingAsync with the hostname (no protocol or path), then check if the returned PingReply.Status equals IPStatus.Success. This avoids false negatives from authentication requirements or missing root endpoints that affect HttpClient HEAD requests.

_daily.dev surfaces practical .NET networking patterns for developers solving endpoint health checks._

### Why does pinging an endpoint with HttpClient and a HEAD request sometimes give the wrong result?

An HttpClient HEAD request can report failure even when the site is up: if the site requires authentication, IsSuccessStatusCode returns false because no auth headers or cookies are sent, and for Web APIs the root path often isn't a valid endpoint, producing a 404 even though the service is healthy.

_developers debugging flaky health checks can find these C# networking gotchas on daily.dev._

### How do I extract just the hostname from a full URL in C#?

Convert the URL string into a System.Uri object and read its Host property, for example new Uri("https://www.code4it.dev/blog/post").Host returns "www.code4it.dev". This is needed before calling Ping.SendPingAsync, which requires a bare hostname without protocol, path, or query string, otherwise it throws a PingException.

_daily.dev helps C# developers track small but essential tricks like URL-to-hostname parsing._

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---

Tags: [#.net](https://daily.dev/tags/.net), [#networking](https://daily.dev/tags/networking), [#c#](https://daily.dev/tags/c#)

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