This helper class concatenates numbers and letters and aligns Hebrew/Arabic between numbers.

BidiConcatHelper.cs

        public static string GetHebrewConcat(char[] charRange, string codeToPoint, Tuple<string, string, string> tupleOfStrings, string separator)
        {
            string[] col_OfConcatValues = { };
            var charArr = tupleOfStrings.Item2.ToCharArray();
            int spins = 0;
            foreach (char eChar in charArr)
            {
                switch (HasHebrew(eChar, false, false, charRange))
                {
                    case true:
                        spins++;
                        if (tupleOfStrings.Item2.Length.Equals(spins))
                        { return string.Join(separator, tupleOfStrings.Item1, string.Concat(codeToPoint, tupleOfStrings.Item2, codeToPoint), tupleOfStrings.Item3); }
                        break;
                    case false:
                        spins++;
                        if (tupleOfStrings.Item2.Length.Equals(spins))
                        { return string.Join(separator, tupleOfStrings.Item1, tupleOfStrings.Item2, tupleOfStrings.Item3); }
                        break;
                }
            }
            return string.Empty;
        }