source: node_modules/prismjs/components/prism-xml-doc.js

(function (Prism) {

        /**
         * If the given language is present, it will insert the given doc comment grammar token into it.
         *
         * @param {string} lang
         * @param {any} docComment
         */
        function insertDocComment(lang, docComment) {
                if (Prism.languages[lang]) {
                        Prism.languages.insertBefore(lang, 'comment', {
                                'doc-comment': docComment
                        });
                }
        }

        var tag = Prism.languages.markup.tag;

        var slashDocComment = {
                pattern: /\/\/\/.*/,
                greedy: true,
                alias: 'comment',
                inside: {
                        'tag': tag
                }
        };
        var tickDocComment = {
                pattern: /'''.*/,
                greedy: true,
                alias: 'comment',
                inside: {
                        'tag': tag
                }
        };

        insertDocComment('csharp', slashDocComment);
        insertDocComment('fsharp', slashDocComment);
        insertDocComment('vbnet', tickDocComment);

}(Prism));