文件夹下按创建时间排序

            string path = @"D:\CacheData";
            FileInfo[] files = new DirectoryInfo(path).GetFiles();
            List<FileInfo> list = new List<FileInfo>(files);
            list.Sort(new Comparison<FileInfo>(delegate(FileInfo a, FileInfo b)
            {
                return a.CreationTime.CompareTo(b.CreationTime);
            }));
            FileInfo f = list[list.Count - 1];

点滴记录---