Snippet - Simple HTTP server using GHI's Premium Net library

but what other links need to add?

When I have a class that is having a reference/using issue I use Google.

In this case, I googled “ipaddress micro framework”. I got the following IPAddress Class | Microsoft Learn. Ooops, this URL does nt work, but you should be able to find what you need now.

The namespace in the documentation is what you use for the using statement. The Dll is what you use for the reference. This is fix requires two actions.

I am sorry. not added library systems.all turned.
I have a question. it possible to make a web page on this server?

Yes, it is. I assume you have a knowledge of the HTTP protocol - a web page is simply a response to a HTTP web request (in fact typically a GET request). In the code you can see this here:

     switch (request.HttpMethod.ToUpper())
                     {
                         case "GET": ProcessClientGetRequest(context); break;
                     }

You need to extend the capability in ProcessClientGetRequest.