How to permanently delete a file so that it becomes unrecoverable?

Question

If I want my application (written in .NET) to delete the file in such a way that it cannot be restored using the disk recovery tool. What are my options?

I think that I open it in write mode, overwrite it all with random data, and this will make the file unrecoverable. Is there another way?

Answer 1

You may find this article in CodeProject useful.

Answer 2

SDELETE: http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx

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Answer 3

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