Outdated documentation

[mbp]

HttpListener exists in .NET Core 2 / .NET Standard, so the description that it fills the void is not true.
It does however fill a different purpose in that it does not depend on http.sys on Windows, which can be useful.

Also, the provided sample in README.md does not compile:

[cherepets]

We had WebListener in Core 1 too so there always was an implementation from Microsoft but it was not crossplatform and less extendable.

About the code, I think the correct one would be like

        if (context.Response.Method == HttpMethod.Get)
        { 
                await context.Response.WriteContentAsync("Hello from Server ...");
        }

[mbp]

You actually also get an error 'HttpListener' is an ambiguous reference between 'System.Net.Http.HttpListener' and 'System.Net.HttpListener

So the first line in the sample must be changed to:

var listener = new System.Net.Http.HttpListener(IPAddress.Parse("127.0.0.1"), 8081);

[StefH]

updated