Converting an int[] to byte[] in C#

If you want a bitwise copy, i.e. get 4 bytes out of one int, then use Buffer.BlockCopy:

byte[] result = new byte[intArray.Length * sizeof(int)];
Buffer.BlockCopy(intArray, 0, result, 0, result.Length);

Don’t use Array.Copy, because it will try to convert and not just copy. See the remarks on the MSDN page for more info.