DES加解密的算法实现，对学习DES加密解密有所帮助-DES encryption and decryption of the algorithm, DES encryption and decryption of learning help

C# 动态移动TXT文件，这个动态算法值得学习一下，值得一看。-C# dynamic mobile TXT file, the dynamic algorithm is worth learning about, worth a look.

显示文件及目录。本程序使用了递归的方法，遍历磁盘目录，最后给出显示结果。类似于资源管理器。侧重于算法实现的学习。-Display files and directories. This program uses a recursive method to traverse the disk directory Finally, the result will be displayed. Similar to the Explorer. Focus on the learning algorith