wdywttt3-ComplexSettings.cs

public class AppSettings {
  public Uri Host { get; set; }
  public ConnectionSettings Connection { get; set; }
  
	public class ConnectionSettings
	{
		public TimeSpan TimesOutIn { get; set; }
		public int RetryCount { get; set; }
	}  
}

var appSettings = configuration.Get<AppSettings>();