Daimto.DotnetCore.ConfigFiles.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using System;
using System.IO;

namespace Daimto.DotnetCore.ConfigFiles
{
    class Program
    {
        //https://stackoverflow.com/questions/44838424/wiring-and-injected-nlog-into-a-net-core-console-application
        public static IConfigurationRoot Configuration { get; set; }
        static void Main(string[] args)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

            Configuration = builder.Build();


            //setup our DI
            var serviceProvider = new ServiceCollection()
                .AddLogging()
                .AddSingleton<IConfigurationRoot>(Configuration)
                .BuildServiceProvider();

            //configure console logging
            serviceProvider
                .GetService<ILoggerFactory>()
                .AddConsole(LogLevel.Debug);

            var logger = serviceProvider.GetService<ILoggerFactory>()
                .CreateLogger<Program>();
            logger.LogDebug("Starting application");

            Console.WriteLine($"Application name: {Configuration["ApplicationName"]} version: {Configuration["Version"]}");
            Console.WriteLine($"ServerPath: {Configuration["Settings:ServerPath"]} TokenExperation: {Configuration["Settings:TokenExperation"]}");
            
            TestClass.hello();
            Console.ReadLine();
        }
    }

    public class MyConfig
    {
        public string ApplicationName { get; set; }
        public int Version { get; set; }

        public class Settings
        {
            public string ServerPath { get; set; }
            public int TokenExperation { get; set; }
        }

    }
    public class TestClass {

        public static void hello() {
            Console.WriteLine("Hello from test class ");
            Console.WriteLine($"ServerPath: {Program.Configuration["Settings:ServerPath"]} TokenExperation: {Program.Configuration["Settings:TokenExperation"]}");
        }

    }
}