GenericHost.cs

using System.Threading.Tasks;
using Automation.Aspects;
using JetBrains.Annotations;

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

using PostSharp.Patterns.Threading;

namespace Automation
{
    [PrivateThreadAware]
    public class GenericHost
    {
        [SingleEntryMethod]
        public async Task Start(GenericPlatform platform, [CanBeNull] string[] args = null)
        {
            var builder = new HostBuilder()
                         .ConfigureAppConfiguration(configureDelegate: (context, config) =>
                         {
                             config.AddJsonFile("appsettings.json", optional: true);
                             config.AddEnvironmentVariables();

                             if (args != null)
                                 config.AddCommandLine(args);
                         })
                         .ConfigureServices(configureDelegate: (context, services) =>
                         {
                             services.AddOptions();
                             services.Configure<AppConfig>(context
                                                             .Configuration
                                                             .GetSection("AppConfig"));
                             services.AddHostedService<TimingService>();
                             services.Configure<AppConfig>(options =>
                             {
                                 options.Platform = platform;
                             });
                         });
            await builder.RunConsoleAsync();
        }
    }
}