Configure NServicebus in Asp.net Core 5 - asp.net-core

Question

I am using the NServiceBus.Extensions.Hosting extension to configure NServicebus
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
private static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseNServiceBus(c =>
{
var endpointConfiguration = new EndpointConfiguration("nsb.medusa");
endpointConfiguration.UseTransport<RabbitMQTransport>().ConnectionString("How do I access app settings?");
endpointConfiguration.SendOnly();
return endpointConfiguration;
})
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
}
The problem I am having is that I don't know how to get an instance of IConfiguration from a IHostBuilder. I need IConfiguration so I can get the connection string to RabbitMQ.
Also can this be moved to the startup class?

Answer 1

Microsoft has some excellent documentation. After reading it I just added two lines of code and I can now access the configuration.
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
private static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseNServiceBus(c =>
{
var configuration = c.Configuration; /* New */
var cnnStr = configuration.GetSection("mq:connection").Value; /* New */
var endpointConfiguration = new EndpointConfiguration("nsb.medusa");
endpointConfiguration.UseTransport<RabbitMQTransport>().ConnectionString(cnnStr);
endpointConfiguration.SendOnly();
return endpointConfiguration;
})
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
}