Our main program

Here's our main.cs, and you will notice that it differs from what we've seen before. The different sections are highlighted as follows:

static void Main(string[] args)
{
var builder = new ContainerBuilder();
// Service itself
builder.RegisterType<MSBaseLogger>()?.SingleInstance();
builder.RegisterType<BitcoinMS>()
.AsImplementedInterfaces()
.AsSelf()
?.InstancePerLifetimeScope();
_container = builder.Build();
XmlConfigurator.ConfigureAndWatch(new FileInfo(@".log4net.config"));
HostFactory.Run(c =>
{
c?.UseAutofacContainer(_container);
c?.UseLog4Net();
c?.ApplyCommandLineWithDebuggerSupport();
c?.EnablePauseAndContinue();
c?.EnableShutdown();
c?.OnException(ex => Console.WriteLine(ex.Message));
c?.Service<BitcoinMS>(s =>
{
s.ConstructUsingAutofacContainer<BitcoinMS>();
s?.ConstructUsing(settings =>
{
var service = AutofacHostBuilderConfigurator...