C＃ - 删除文件永久 [英] C# - Deleting a file permanently

问题描述

我已经出了C＃游戏一段时间，因为我开始iPhone的东西，但你怎么能彻底删除该文件（所以它不是存储在内存中），而不是可恢复。如果你不能永久删除它可以你争我夺它与随机数据，因此其未开封的，但仍然存在？

I've been out of the C# game for a while since I started iPhone stuff, But how can you delete a file completely (so its not stored in memory) and isn't recoverably. If you cant delete it forever can you scramble it up with random data so its un-openable but still exists?

谢谢！

推荐答案

这当然可能覆盖一个文件，使以前的内容无法恢复。但是，这必须由驱动器本身来完成，以确保正确的块被覆盖C＃与文件系统，而不是物理块交互，因此不会提供任何安全性。

It's certainly possible to overwrite a file so that the previous content cannot be recovered. But this has to be done by the drive itself to make sure the correct block is overwritten... C# interacts with the filesystem, not physical blocks, so won't provide any security.

问一个驱动器安全擦除一些实际的方式与界面变化（ATAPI VS SATA，VS USB大容量存储VS SCSI VS火线）和C＃不提供在这个级别居高临下的简单方法。

The actual way to ask a drive to securely erase something varies with interface (ATAPI vs SATA, vs USB mass-storage vs SCSI vs firewire), and C# doesn't provide a simple way of commanding at this level.

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