WikiFunctions.Parse.HideText.AddBack C# (CSharp) Method

        private string AddBack(string articleText, List<HideObject> Tokens)
        {
            // performance: return cached value if no changes made to articleText
            if (cachedArticleTextAfterHide.Equals(articleText))
            {
                articleText = cachedOriginalArticleTextBeforeHide;

                // clear down
                cachedOriginalArticleTextBeforeHide = "";
                cachedArticleTextAfterHide = "";
            }
            else
            {
                // while loop as there can be nested hiding
                while (HiddenRegex.IsMatch(articleText))
                    articleText = HiddenRegex.Replace(articleText, m => Tokens[int.Parse(m.Groups[1].Value)].Text);
            }

            Tokens.Clear();
            return articleText;
        }

        /// <summary>
        /// Extracts all of the interwiki and interwiki featured article links from the article text
        /// Ignores interwikis in comments/nowiki tags
        /// </summary>
        /// <param name="articleText">Article text with interwiki and interwiki featured article links removed</param>
        /// <returns>string of interwiki and interwiki featured article links</returns>
        public string Interwikis(ref string articleText)
        {
            string interWikiComment = "";

            if (InterLangRegex.IsMatch(articleText))
            {
                interWikiComment = InterLangRegex.Match(articleText).Value;
                articleText      = articleText.Replace(interWikiComment, "");
            }

            // http://en.wikipedia.org/wiki/Wikipedia_talk:AutoWikiBrowser/Bugs/Archive_12#Interwiki_links_moved_out_of_comment
            HideText hider = new HideText(false, true, false);

            articleText = hider.Hide(articleText);

            string interWikis = ListToString(RemoveLinkFGAs(ref articleText));

            if (interWikiComment.Length > 0)
            {
                interWikis += interWikiComment + "\r\n";
            }

            interWikis += ListToString(RemoveInterWikis(ref articleText));

            articleText = hider.AddBack(articleText);

            return(interWikis);
        }