fix: Try another way of making logger

Author: Reikyo

Examples/BookingSystem.AspNetFramework/Utils/ServiceConfig.cs

@@ -35,7 +35,8 @@ public static void Register(HttpConfiguration config)
             services.AddTransient<OpenDataController>();
             services.AddTransient<OpenBookingController>();
             // var logger = LoggerFactory.AddConsole().CreateLogger<FakeBookingSystem>();
-            var logger = new ILogger<FakeBookingSystem>();
+            // var logger = new ILogger<FakeBookingSystem>();
+            var logger = new NullLogger<FakeBookingSystem>();
             services.AddSingleton<IBookingEngine>(sp => EngineConfig.CreateStoreBookingEngine(appSettings, new FakeBookingSystem(false, logger)));
 
             var resolver = new DependencyResolver(services.BuildServiceProvider(true));