c# - 404 error Localhost:8000 asp.Net -

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if un-comment app.run(async (context) => ... part of code can run html within code without issues. trying use index.html in wwwroot default. 404 error. how fix this?

using system; using system.collections.generic; using system.linq; using system.threading.tasks; using microsoft.aspnet.builder; using microsoft.aspnet.hosting; using microsoft.aspnet.http; using microsoft.extensions.dependencyinjection;  namespace theworld {     public class startup     {         public void configureservices(iservicecollection services)         {         }          // method gets called runtime. use method  configure http request pipeline.         public void configure(iapplicationbuilder app)         {            //  app.run(async (context) =>           //{           //    var link = @"<!doctype html>           //   <html>           //      <head>           //      <title>test</title>           //      </head>           //      <body>           //          <h1>testfile</h1>           //      </body>           //    </html>";           //    await context.response.writeasync(link);           //});         }           // entry point application.         public static void main(string[] args) => webapplication.run<startup>    (args);     } }

you can use nuget-package microsoft.owin.staticfiles , first thing in configure write this:

    app.usedefaultfiles(new defaultfilesoptions     {         defaultfilenames = new list<string>() { "index.html" }     });

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