Sarcasm.Unparsing.Formatter.GetCleanedUpCommentTextLines C# (CSharp) Method

        public virtual string[] GetCleanedUpCommentTextLines(string[] commentTextLines, int columnIndex, CommentTerminal commentTerminal, out bool isDecorated)
        {
            if (commentTextLines.Length > 1)
            {
                bool _isDecorated = false;

                commentTextLines = commentTextLines
                    .Select(
                        (commentTextLine, lineIndex) =>
                        {
                            string trimmedStartCommentTextLine = commentTextLine.TrimStart();
                            string trimmedStartMultiLineCommentDecorator = MultiLineCommentDecorator.TrimStart();
                            string trimmedMultiLineCommentDecorator = trimmedStartMultiLineCommentDecorator.TrimEnd();

                            if (trimmedStartCommentTextLine.StartsWith(trimmedStartMultiLineCommentDecorator))
                            {
                                _isDecorated = true;
                                return trimmedStartCommentTextLine.Remove(0, trimmedStartMultiLineCommentDecorator.Length);   // decorated
                            }
                            else if (trimmedStartCommentTextLine.StartsWith(trimmedMultiLineCommentDecorator))
                            {
                                _isDecorated = true;
                                return trimmedStartCommentTextLine.Remove(0, trimmedMultiLineCommentDecorator.Length);    // decorated with missing whitespaces at the right of decorator
                            }
                            else if (commentTextLine.Length >= columnIndex && commentTextLine.Take(columnIndex).All(ch => char.IsWhiteSpace(ch)))
                                return commentTextLine.Remove(0, columnIndex);    // undecorated -> remove indentation
                            else
                                return commentTextLine;   // undecorated -> could not remove indentation (the indentation of this line is smaller then the indentation of the start of the comment)
                        }
                    )
                    .ToArray();

                isDecorated = _isDecorated;
                return commentTextLines;
            }
            else
            {
                isDecorated = false;
                return commentTextLines;
            }
        }