Hi,Yossu

Yossu

However, the log file did not contain the message I added.

I tested your code and reproduced the problem, then solved it by changing the code in appsettings.Devlopment.json to this:

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

Result:

Best Regards,

Jerry Cai