private bool TryReadCircle(string value, out object result)
        {
            if (!_shapeConverter.CanConvert(ObjectType.Circle))
            {
                result = null;
                return(false);
            }

            var match = Regex.Match(value,
                                    @"Circle \s* \( \s* ([+-]?(?:\d+\.?\d*|\d*\.?\d+)) \s+ ([+-]?(?:\d+\.?\d*|\d*\.?\d+)) \s+ d=([+-]?(?:\d+\.?\d*|\d*\.?\d+)) \s* \)",
                                    RegexOptions.IgnorePatternWhitespace | RegexOptions.IgnoreCase);

            if (match.Success)
            {
                result = _shapeConverter.ToCircle(new double[]
                {
                    double.Parse(match.Groups[1].Value, CultureInfo.InvariantCulture),
                    double.Parse(match.Groups[2].Value, CultureInfo.InvariantCulture),
                    double.Parse(match.Groups[3].Value, CultureInfo.InvariantCulture)
                });
                return(true);
            }
            result = null;
            return(false);
        }