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 can be solved by registering the ILogger manually to use the Startup class as type.

Example:

public void ConfigureServices(IServiceCollection services)
{
    // Normal AddLogging
    services.AddLogging();

    // Additional code to register the ILogger as a ILogger where T is the Startup class
    services.AddSingleton(typeof(ILogger), typeof(Logger)); 
  
    // ...
}