/// 
        /// 在创建SP文库库下动态新增文件夹        /// 
        ///         ///         private void CreateFileDir(List spList,string _folderName)        {            ListItemCreationInformation information;            SP.ListItem folder;            information = new ListItemCreationInformation()            {                LeafName = _folderName,                UnderlyingObjectType = SP.FileSystemObjectType.Folder            };            folder = spList.AddItem(information);            folder.Update();            context.ExecuteQuery();        }