AdderKata.Calculator.VerifyNoNegativeNumbers C# (CSharp) Method

        private static void VerifyNoNegativeNumbers(List<int> numbers)
        {
            var negativeNumbers = numbers.Where(x => x < 0).ToList();
            if (negativeNumbers.Count > 0)
            {
                var message = "negatives not allowed";
                negativeNumbers.ForEach(x => message += " " + x);
                throw new ArgumentException(message);
            }
        }