/// <summary>
        /// 获取注释
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public static string GetComments(this Type type)
        {
            XPathNavigator navigator = GetXmlDoc(type)?.CreateNavigator();

            if (navigator == null)
            {
                return(string.Empty);
            }
            var commentId = XmlCommentsIdHelper.GetCommentIdForType(type);
            var typeNode  = navigator.SelectSingleNode(string.Format(MemberXPath, commentId));

            if (typeNode != null)
            {
                var summaryNode = typeNode.SelectSingleNode(SummaryTag);
                if (summaryNode != null)
                {
                    return(summaryNode.ExtractContent());
                }
            }
            return("");
        }