WikiFunctions.Parse.Parsers.SelfLinks C# (CSharp) Method

        private static string SelfLinks(string zerothSection, string articleTitle)
        {
            string zerothSectionOriginal = zerothSection, escTitle = Regex.Escape(articleTitle);

            if (!zerothSection.Contains("'''" + articleTitle + "'''"))
            {
                Regex r1 = new Regex(@"\[\[\s*" + escTitle + @"\s*\]\]");
                Regex r3 = new Regex(@"\[\[\s*" + escTitle + @"\s*\|\s*([^\[\]]+?)\s*\]\]");

                zerothSection = r1.Replace(zerothSection, "'''" + articleTitle + @"'''");
                zerothSection = r3.Replace(zerothSection, "'''$1'''");
            }

            if (zerothSectionOriginal.Equals(zerothSection) && !zerothSection.Contains("'''" + Tools.TurnFirstToLower(articleTitle) + "'''"))
            {
                Regex r2 = new Regex(@"\[\[\s*" + Tools.TurnFirstToLower(escTitle) + @"\s*\]\]");
                Regex r4 = new Regex(@"\[\[\s*" + Tools.TurnFirstToLower(escTitle) + @"\s*\|\s*([^\[\]]+?)\s*\]\]");

                zerothSection = r2.Replace(zerothSection, "'''" + Tools.TurnFirstToLower(articleTitle) + @"'''");
                zerothSection = r4.Replace(zerothSection, "'''$1'''");
            }

            return zerothSection;
        }