How to reconfigure after AppSettings.json reloaded?

I use `loggerFactory.AddFile(AppSettings.Configuration.GetSection("Logging:Serilog"));` in `Startup.Configure`, when `appsettings.json` file changed, i want update the settings of serilog.
I use `ChangeToken.OnChange` for response the changing:
```c#
ChangeToken.OnChange(() => AppSettings.Configuration.GetReloadToken(), env_ =>
{
    //how to reconfigure serilog?
}, env);
```