how to use a 2d array in csharp

int[,] arr = new int[3,3];//declaration of 2D array  
int[,] arr = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }}//another way to declare
arr[1,2]=20; //access to the array

// Two-dimensional array.
int[,] array2D = new int[,] { { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 } };

// in namespace, above main form declaration

public class Globals
    {
        public static string[,] tableArray;
	}

//... in main or other method

Globals.tableArray = new string[rowLength,colLength];