多次元配列の使い方|C#

int[,] array2D = new int[2, 3];
array2D[0, 0] = 0;
array2D[0, 1] = 1;
array2D[0, 2] = 2;
array2D[1, 0] = 10;
array2D[1, 1] = 11;
array2D[1, 2] = 12;

foreach (int i in array2D) {
    Console.WriteLine(i);
}

0
1
2
10
11
12

int[,] array2D = new int[2, 3];

// 要素の総数.
Console.WriteLine(array2D.Length);
// １次元目の要素数.
Console.WriteLine(array2D.GetLength(0));
// ２次元目の要素数.
Console.WriteLine(array2D.GetLength(1));

6
2
3