The performance concern of AES (RijndaelManaged) in .NET

I intend to encrypt large data (around 3-5 MB) with RijndaelManaged. Is there any performance issue\suggestion on doing so?


        RijndaelManaged rijndaelCipher = new RijndaelManaged();
        rijndaelCipher.Mode = CipherMode.CBC;
        rijndaelCipher.Padding = PaddingMode.PKCS7;
        rijndaelCipher.KeySize = 128;
        rijndaelCipher.BlockSize = 128;


No I can safely say there will not be any performance issues. Here's what I timed (And this includes some disk access:

00:00:00.26 seconds for 2MB

Like I said faster than you can blink: see wiki

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Changing background position and menu bar translucence

objective-c osx cocoa

How can I change the desktop background position (one of "Fill Screen", "Fit to Screen", "Stretch to Fill Screen", "Center" or "Tile") and the menu bar translucence (on or off) from code?

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