说明：  用一个文件虚拟为磁盘，在其上模拟多级目录的FAT文件系统。并提供相应的用户操作界面。可以开发为控制台应用程序或windows窗体程序。 功能： 实现基本的目录和文件的操作。比如，目录的切换，显示当前路径，显示目录内容，目录和文件的建立、复制、删除、重命名，文件内容显示，文件导入（从真实的文件系统中导入一个文件存放到该模拟文件系统中），文件的导出（将模拟文件系统中的一个文件导出到真实的文件系统中）。
(A disk with a file virtualization, in its multi-level simulation of FAT file system directory. And provide the user interface. Can be developed for the console application or windows form program. Features: The directories and files for basic operation. For example, change the directory to display the current path, display directory contents, directory and file of the build, copy, delete, rename, file content display, file import (from the real file system into a file stored in the file system of the simulation ), document export (to mimic the file system to export a file to the real file system.) )