Unable to resolve service for type 'Microsoft.Extensions.Logging.ILogger`1[WebApplication1.Startup]'

Question

I created an ASP.NET Core 3.0 Web Application with the default template in Visual Studio 2019 Preview 2.2 and tried to inject an ILogger in Startup:

namespace We         


        

Answer 1

This issue is related with IHostBuilder.

For a temp workaround, I suggest you try IWebHost to replace IHostBuilder.

Change your Program.cs like

public class Program
{
    public static void Main(string[] args)
    {           
        BuildWebHost(args).Run();
    }
    public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup()
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.AddConsole();
                })
                .Build();      
}