ASP.NET 3.0 IhostBuilder does not contain definition of UserKestrel

Question

User-1602535186 posted

I have ASP.NET 3.0 Application, I am getting error as IHostBuilder does not contain definition of UseKestrel. Can I Use UseKestrel or ConfigureKestrel In ASP.NET 3.0 ?  

Answer 1

User-474980206 posted

       public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.AddConsole();
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseKestrel(options => {} );
                    webBuilder.UseStartup<Startup>();
                });

that is correct. UseKestrel() is an extension method for a IWebHostBuilder. use the ConfigeWebHostDefaults() extension method:

Answer 2

User-1602535186 posted

Means I have to use, But how ConfigureKestrel As I have code .ConfigureKestrel((context, options) => { //Some Code }

ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});         

Answer 3

User-1602535186 posted

I am getting error as ''Cannot resolve scoped service from root provider.'' when using options.ApplicationServices.GetRequiredService<IServiceName>

Answer 4

User-474980206 posted

                .ConfigureWebHostDefaults(webBuilder =>
                {
                    // .UseKestrel() not needed because its the default
                    webBuilder.ConfigureKestrel(options => {
                    });
                    webBuilder.UseStartup<Startup>();
                });

Answer 5

User-1602535186 posted

Still the error persist

Answer 6

User711641945 posted

Hi TechAspirant,

> IHostBuilder does not contain definition of UseKestrel

IHostBuilder contains the definition of UseKestrel.

Reference:

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/servers/kestrel?view=aspnetcore-3.1#kestrel-in-aspnet-core-apps

You just share the part of program.cs.What is your whole program.cs and Startup.cs?Please share a simple demo which could reproduce the issue.Otherwise,we can't reproduce your issue and help you resolve it.

Best Regards,

Rena