/// <summary>
        /// 获取图片类型扩展名列表
        /// </summary>
        public static string GetExtensions(this ImageType fileType)
        {
            var name = Util.Helpers.Enum.GetName <ImageType>(fileType);

            return(FileTypeHelper.GetExtensions(name));
        }
        /// <summary>
        /// 获取文档类型扩展名列表
        /// </summary>
        public static string GetExtensions(this DocumentType fileType)
        {
            var name = Bing.Utils.Helpers.Enum.GetName <DocumentType>(fileType);

            return(FileTypeHelper.GetExtensions(name));
        }