Newtonsoft.Json.JsonTextReader.ParseUnquotedProperty C# (CSharp) Method

        private void ParseUnquotedProperty()
        {
            int initialPosition = _charPos;

            // parse unquoted property name until whitespace or colon
            while (true)
            {
                switch (_chars[_charPos])
                {
                    case '\0':
                        if (_charsUsed == _charPos)
                        {
                            if (ReadData(true) == 0)
                            {
                                throw JsonReaderException.Create(this, "Unexpected end while parsing unquoted property name.");
                            }

                            break;
                        }

                        _stringReference = new StringReference(_chars, initialPosition, _charPos - initialPosition);
                        return;
                    default:
                        char currentChar = _chars[_charPos];

                        if (ValidIdentifierChar(currentChar))
                        {
                            _charPos++;
                            break;
                        }
                        else if (char.IsWhiteSpace(currentChar) || currentChar == ':')
                        {
                            _stringReference = new StringReference(_chars, initialPosition, _charPos - initialPosition);
                            return;
                        }

                        throw JsonReaderException.Create(this, "Invalid JavaScript property identifier character: {0}.".FormatWith(CultureInfo.InvariantCulture, currentChar));
                }
            }
        }