AspNetCoreHosting example can run successfully with some small modifications

[tbebekis-ax]

1. Add a static public field to Webview class
   static public int Port = 0;

2. Assign that field in the Main() getting the port value from the launchSettings.json

        public static void Main(string[] args)
        {
            Webview.Webview.Port = 11042; // <<<      

            CreateWebHostBuilder(args)
                .WithDynamicPort()
                .UseKestrel()
                .WithNoOutput()
                .Build()
                .RunWebview();
        }

3. Modify the internal Webview constructor passing the Url

            string sUrl = $"http://localhost:{Port}"; // content.ToUri();            

            _webview = webview_alloc(
                title,
                sUrl,
                size.Width,
                size.Height,
                resizable ? 1 : 0,
                debug ? 1 : 0,
                cb);

PS. It seems that there is no way to get the "right" application url
using IServerAddressesFeature or any other trick.
If there is such a trick then I'll be happy to know.

[ghost]

You need to use host.Start() to start Webhost before you can use IServerAddressesFeature to get the application url