Startup.cs

// ...
using Microsoft.Extensions.Logging;

namespace WebApplication1
{
    public class Startup
    {
        // ...
        
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(LogLevel.Trace);
            // ...