Getting a double[] row array of a double[,] rectangular array

Question

Suppose you have an array like:

double[,] rectArray = new double[10,3];

Now you want the fouth row as a double[] array of 3 elements without do

Answer 1

You can use Buffer.BlockCopy method:

const int d1 = 10;
const int d2 = 3;
const int doubleSize = 8;

double[,] rectArray = new double[d1, d2];
double[] target = new double[d2];

int rowToGet = 3;
Buffer.BlockCopy(rectArray, doubleSize * d2 * rowToGet, target, 0, doubleSize * d2);