Have you missed a few lines of code?

[ShervanN]

Hi,

On page 425, Logging, you wrote:

When you run the application with successful and unsuccessful results, you can see the following output on
the console:

I guess you have forgotten to write the below codes in the book. Without the following code, the sample program will not work.

var runner = host.Services.GetRequiredService<Runner>();
await runner.RunAsync();

Console.WriteLine("Bye... Press return to exit");
Console.ReadLine();