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

If you must use a rectangular array and just want to simplify the syntax, you can use a method to get the row like so:

double[] fourthRow = GetRow(rectArray, 3);

public static T[] GetRow(T[,] matrix, int row)
{
    var columns = matrix.GetLength(1);
    var array = new T[columns];
    for (int i = 0; i < columns; ++i)
        array[i] = matrix[row, i];
    return array;
}