public List <string> ListNumeric(string charsetName)
        {
            if (charsetName == "numeric")
            {
                //numeric
                charsetSelecting = Numeric;
            }
            else if (charsetName == "numeric-space")
            {
                //numeric-space
                charsetSelecting = Numeric.Concat(Space).ToList();
            }

            return(charsetSelecting);
        }
        public List <string> ListHexa(string charsetName)
        {
            if (charsetName == "hex-lower")
            {
                //hex-lower
                charsetSelecting = Numeric.Concat(Hex_lower).ToList();
            }
            else if (charsetName == "hex-upper")
            {
                //hex-upper
                charsetSelecting = Numeric.Concat(Hex_upper).ToList();
            }

            return(charsetSelecting);
        }