System.Text.RegularExpressions.RegexCharClass.ToStringClass C# (CSharp) Method

        internal String ToStringClass() {
            if (!_canonical)
                Canonicalize();

            // make a guess about the length of the ranges.  We'll update this at the end. 
            // This is important because if the last range ends in LastChar, we won't append
            // LastChar to the list. 
            int rangeLen = _rangelist.Count * 2 ;
            StringBuilder sb = new StringBuilder(rangeLen + _categories.Length + 3);

            int flags;
            if (_negate) 
                flags = 1;
            else
                flags = 0;

            sb.Append((char) flags);
            sb.Append((char) rangeLen);
            sb.Append((char) _categories.Length);
            
            for (int i = 0; i < _rangelist.Count; i++) {
                SingleRange currentRange = (SingleRange)_rangelist[i];
                sb.Append(currentRange._first);

                if (currentRange._last != Lastchar)
                    sb.Append((char)(currentRange._last + 1));
            }

            sb[SETLENGTH] = (char) (sb.Length - SETSTART);
            
            sb.Append(_categories);

            if (_subtractor != null)
                sb.Append(_subtractor.ToStringClass());
            
            return sb.ToString();
        }

        internal String GetFirstChars(CultureInfo culture)
        {
            if (_caseInsensitive)
            {
                _cc.AddLowercase(culture);
            }

            return(_cc.ToStringClass());
        }