public ActionResult <int> CheckNumber([FromRoute] string number) { var guessedNumber = NumberService.Validate(number); if (guessedNumber is null) { var errorMessage = string.Format(Resources.InvalidNumberMessage, Resources.LowerBound, Resources.UpperBound); return(BadRequest(errorMessage)); } Logger.Log($"Checking number {guessedNumber}..."); if (guessedNumber < CorrectNumber) { Logger.Log("Unfortunately, this number is too low."); return(StatusCode(303, Resources.TooLowMessage)); } if (guessedNumber > CorrectNumber) { Logger.Log("Unfortunately, this number is too high."); return(StatusCode(303, Resources.TooHighMessage)); } Logger.Log("Awesome, this is the correct number!"); return(Ok(Resources.CorrectGuessMessage)); }