ABN Validator for Australia

public class AbnValidator
    {
        public const int Abn_Length = 11;
        public const int Expected_Sum = 89;

        //We memorize control numbers here instead than in the method
        static int[] controlValues = new[] { 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 };

        public static bool Validate(string abn_)
        {
            //This will perform the same action of Trim().Replace(" ", "") and the whole conversion of single digits into numbers
            var digits = abn_.Where(char.IsDigit).Select(c => int.Parse($"{c}")).ToArray();

            // check length after remove non digit chars
            if (digits.Length != Abn_Length)
            {
                return false;
            }

            //We do the sum of multiplication digit per digit of our values
            var sum = digits.Skip(1).Zip(controlValues, (digit, control) => digit * control).Sum() + (digits[0] - 1) * 10;


            //We compute and return if the sum is correct or not
            return sum % Expected_Sum == 0;
        }
    }

And this is a simple test class

    <pre>[TestClass]
    public class __General_Tests_01
    {
        [TestMethod]
        public void Test_AbnValidator_01()
        {
            var test_name = System.Reflection.MethodBase.GetCurrentMethod().Name;

            {
                var abn = "53 611 866 794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "54 613 086 141";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "55 611 030 338";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "79 612 492 145";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }

        }
        [TestMethod]
        public void Test_AbnValidator_02()
        {
            var test_name = System.Reflection.MethodBase.GetCurrentMethod().Name;

            {
                var abn = "53611866794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "53X 611 y866 Z794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "53 611 866                           794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "53               611 866 794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }
            {
                var abn = "53  djfgdkjfgfdgfd 611 866 794";
                var ok = AbnValidator.Validate(abn);
                Console.WriteLine($"abn <{abn}> => {ok}");
                Assert.IsTrue(ok);
            }

        }
    }