Delete last N bytes from file

There's a file on disk which can be very large. Is there any way to delete the last N bytes from it without copying the remaining content to another f开发者_如何学Cile?

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How about this fragment of C# .NET code?

FileInfo fi = new FileInfo("filename");
FileStream fs = fi.Open(FileMode.Open);

long bytesToDelete = 5000;
fs.SetLength (Math.Max(0, fi.Length - bytesToDelete));

fs.Close();

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Additionally, if you want to add or remove bytes at any position: Insert, delete space at any place in file without making temporary file copy