VAGSuite.Tools.StripNonDigit C# (CSharp) 메소드

        private string StripNonDigit(string input)
        {
            string retval = string.Empty;
            foreach (char c in input)
            {
                if (c >= 0x30 && c <= 0x39) retval += c;
            }
            return retval;
        }