Host webForm on kestrel (SOS)

Hello,

I Have an emergent issue to resolve....SOS

The solution has two projects:

1- The first one is a Windows application where ASP NET CORE is installed to use kestrel server for self hosting

2- The seconde  is a WEBFORM project(web site) that i want to host in kestrel.

in the first project we have:

string sApplicationPath = _appPath.ToString();

_host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(_appPath.ToString())
.UseUrls("http://localhost:" + _appPort.ToString() + "/")

.UseStartup<KestrelStartup>()
.Build();

_host.Start();

The Class KestrelStartup:

public class KestrelStartup
    {
        public void ConfigureServices(IServiceCollection services)
        {

            
        }

        public void Configure(IApplicationBuilder app)
        {
            app.UseDefaultFiles();
            app.UseStaticFiles();
        }
    }

With fiddler , I have checked that request is launched by kestrel server and the page to reach is default.aspx, but it return 404 error :

GET /default.aspx?lng=en-US HTTP/1.1
Accept: */*
Accept-Language: fr-FR
UA-CPU: AMD64
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Win64; x64; Trident/7.0; .NET CLR 2.0.50727; SLCC2; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; GWX:DOWNLOADED)
Host: localhost:8081
Connection: Keep-Alive

HTTP/1.1 404 Not Found
Date: Tue, 30 Aug 2016 09:11:40 GMT
Content-Length: 0
Server: Kestrel

So all i want to do is to publish my website(2nd project) on kestrel,

I'm simply not sure of how to configure that and to confirm that there no issue to host a WEBFORM on KESTREL

Thanks in advance.

Liline