Question

In my application comes with an uninstaller.
Everything is working fine, except that I can’t find no way to delete the uninstaller.exe file when it’s all done.

I tried to copy the current assembly exe into a temp directory, but the file-handle of the original file is still locked.

Any ideas?

Answer 1

You will need to PInvoke to do this. MoveFileEx has the ability to schedule deleting the file on next reboot.

If dwFlags specifies MOVEFILE_DELAY_UNTIL_REBOOT and lpNewFileName is NULL, MoveFileEx registers the lpExistingFileName file to be deleted when the system restarts.

Something like:

[return: MarshalAs (UnmanagedType.Bool)]
[DllImport ("kernel32", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool MoveFileEx (string lpExistingFileName, string lpNewFileName, int dwFlags);

public static bool ScheduleDelete (string fileFullName) {
    if (!File.Exists (fileFullName))
        throw new InvalidOperationException ("File does not exist.");

    return MoveFileEx (fileFullName, null, 0x04); //MOVEFILE_DELAY_UNTIL_REBOOT = 0x04
}