System.Text.RegularExpressions.RegexRunner.TextposDescription C# (CSharp) Method

        internal virtual string TextposDescription()
        {
            var sb = new StringBuilder();
            int remaining;

            sb.Append(runtextpos);

            if (sb.Length < 8)
                sb.Append(' ', 8 - sb.Length);

            if (runtextpos > runtextbeg)
                sb.Append(RegexCharClass.CharDescription(runtext[runtextpos - 1]));
            else
                sb.Append('^');

            sb.Append('>');

            remaining = runtextend - runtextpos;

            for (int i = runtextpos; i < runtextend; i++)
            {
                sb.Append(RegexCharClass.CharDescription(runtext[i]));
            }
            if (sb.Length >= 64)
            {
                sb.Length = 61;
                sb.Append("...");
            }
            else
            {
                sb.Append('$');
            }

            return sb.ToString();
        }