Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

using NLog.Extensions.Logging;

namespace StudyManagement {
    public class Program {
        public static void Main(string[] args) {
            CreateWebHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateWebHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .ConfigureLogging((hostingContext, logging) => {
                // 保留官方的代码中的默认日志程序
                logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
                logging.AddConsole();
                logging.AddDebug();
                logging.AddEventSourceLogger();
                // 引入 nlog
                logging.AddNLog();
            }).ConfigureWebHostDefaults(webBuilder => {
                webBuilder.UseStartup<Startup>();
            });
    }
}