public void CreateBus(IServiceCollectionBusConfigurator busConfigurator, IStartupBusConfigurator configurator) { if (!configurator.HasSchedulerEndpoint) { busConfigurator.AddServiceBusMessageScheduler(); } busConfigurator.UsingAzureServiceBus((context, cfg) => { var options = context.GetRequiredService <IOptions <ServiceBusOptions> >().Value; if (string.IsNullOrWhiteSpace(options.ConnectionString)) { throw new ConfigurationException("The Azure Service Bus ConnectionString must not be empty."); } cfg.Host(options.ConnectionString); if (!configurator.TryConfigureQuartz(cfg)) { Log.Information("Configuring Azure Service Bus Message Scheduler (enqueue time)"); cfg.UseServiceBusMessageScheduler(); } configurator.ConfigureBus(cfg, context); }); }