public HtmlContentFormatter(IHtmlFeatureFormatter htmlFeatureFormatter, HtmlIndexFormatter htmlIndexFormatter)
        {
            if (htmlFeatureFormatter == null)
            {
                throw new ArgumentNullException("htmlFeatureFormatter");
            }

            if (htmlIndexFormatter == null)
            {
                throw new ArgumentNullException("htmlIndexFormatter");
            }

            this.htmlFeatureFormatter = htmlFeatureFormatter;
            this.htmlIndexFormatter = htmlIndexFormatter;
        }
        public HtmlContentFormatter(IHtmlFeatureFormatter htmlFeatureFormatter, HtmlIndexFormatter htmlIndexFormatter)
        {
            if (htmlFeatureFormatter == null)
            {
                throw new ArgumentNullException("htmlFeatureFormatter");
            }

            if (htmlIndexFormatter == null)
            {
                throw new ArgumentNullException("htmlIndexFormatter");
            }

            this.htmlFeatureFormatter = htmlFeatureFormatter;
            this.htmlIndexFormatter   = htmlIndexFormatter;
        }