/// <summary/>
        public HtmlFormat()
        {
            const string regJavaScript     = @"(?<=&lt;script(?:\s.*?)?&gt;).+?(?=&lt;/script&gt;)";
            const string regComment        = @"&lt;!--.*?--&gt;";
            const string regAspTag         = @"&lt;%@.*?%&gt;|&lt;%=?|%&gt;|&lt;\?php|&lt;\?|\?&gt;";
            const string regPhpCode        = @"(?<=&lt;\?).*?(?=\?&gt;)|(?<=&lt;\?php).*?(?=\?&gt;)";
            const string regAspCode        = @"(?<=&lt;%=?).*?(?=%&gt;)";
            const string regTagDelimiter   = @"(?:&lt;/?!?\??(?!%)|(?<!%)/?&gt;)+";
            const string regTagName        = @"(?<=&lt;/?!?\??(?!%))[\w\.:-]+(?=.*&gt;)";
            const string regAttributes     = @"(?<=&lt;(?!%)/?!?\??[\w:-]+).*?(?=(?<!%)/?&gt;)";
            const string regEntity         = @"&amp;\w+;";
            const string regAttributeMatch = @"(=?"".*?""|=?'.*?')|([\w:-]+)";

            string regAll = "(" + regJavaScript + ")|(" + regComment + ")|("
                            + regAspTag + ")|(" + regAspCode + ")|(" + regPhpCode + ")|("
                            + regTagDelimiter + ")|(" + regTagName + ")|("
                            + regAttributes + ")|(" + regEntity + ")";

            CodeRegex   = new Regex(regAll, RegexOptions.IgnoreCase | RegexOptions.Singleline);
            attribRegex = new Regex(regAttributeMatch, RegexOptions.Singleline);

            csf = new CSharpFormat();
            jsf = new JavaScriptFormat();
            phf = new PhpFormat();
        }
        /// <summary>
        /// TBD
        /// </summary>
        public static Tuple <bool, string> FormatCode(string lang, string code)
        {
            SourceFormat sf = null;

            switch (lang)
            {
            case "csharp":
            case "cs":
                sf = new FSharp.Formatting.CSharpFormat.CSharpFormat();
                break;

            case "c++":
            case "cpp":
                sf = new CPlusPlusFormat();
                break;

            case "js":
            case "javascript":
                sf = new JavaScriptFormat();
                break;

            case "ts":
            case "typescript":
                sf = new TypeScriptFormat();
                break;

            case "vb":
            case "basic":
                sf = new VisualBasicFormat();
                break;

            case "sql":
                sf = new TsqlFormat();
                break;

            case "msh":
                sf = new MshFormat();
                break;

            case "haskell":
                sf = new HaskellFormat();
                break;

            case "php":
                sf = new PhpFormat();
                break;

            case "fsharp":
            case "fs":
                sf = new FSharpFormat();
                break;

            case "html":
            case "xml":
            case "aspx":
                sf = new HtmlFormat();
                break;

            case "paket":
                sf = new PaketFormat();
                break;
            }
            if (sf == null)
            {
                return(Tuple.Create(false, SourceFormat.EscapeHtml(code, tabSpaces: 2)));
            }
            else
            {
                sf.TabSpaces = 2;
                return(Tuple.Create(true, sf.FormatCode(code)));
            }
        }