using System;
public class Test
{
const int X = 5;
const int Y = 6;
const int Z = 7;
public static void Main()
{
byte[,,] threeD = new byte[X,Y,Z];
byte[] res = new byte[X*Y*Z];
Buffer.BlockCopy(threeD, 0, res, 0, X*Y*Z*sizeof(byte));
}
}
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