public void Add(string contentName, IList <IncludeItem> items)
        {
            IncludeContent content = this.GetContent(contentName);

            if (content != null)
            {
                content.Add(items);
            }
        }
        public void Add(string key, string value)
        {
            IncludeItem item = new IncludeItem(key, value);

            _default.Add(item);
        }