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Asked: 2026-05-11T00:48:03+00:00

I am trying to write a C# http server for a personal project, i

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I am trying to write a C# http server for a personal project, i am wondering how i can change the returned server header from Microsoft-HTTPAPI/2.0, to something else?

 public class HttpWebServer     {         private HttpListener Listener;          public void Start()         {             Listener = new HttpListener();             Listener.Prefixes.Add('http://*:5555/');             Listener.Start();             Listener.BeginGetContext(ProcessRequest, Listener);             Console.WriteLine('Connection Started');         }          public void Stop()         {             Listener.Stop();         }          private void ProcessRequest(IAsyncResult result)         {             HttpListener listener = (HttpListener)result.AsyncState;             HttpListenerContext context = listener.EndGetContext(result);              string responseString = '<html>Hello World</html>';             byte[] buffer = Encoding.UTF8.GetBytes(responseString);              context.Response.ContentLength64 = buffer.Length;             System.IO.Stream output = context.Response.OutputStream;             output.Write(buffer, 0, buffer.Length);             output.Close();              Listener.BeginGetContext(ProcessRequest, Listener);         }     }
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1 Answer

  1. The HttpListener class encapsulates the native API, HttpSendHttpResponse Function, which as stated in the link will always append the preposterous text to the server header information.

    There’s no way how to fix that, unless you want to code your HttpListener from scratch.

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