Multi-Dimensional

A multi-dimensional array is an array of arrays.
To create a two-dimensional array, add each array within its own set of curly braces:

int[,] myNumbers = {{1, 2, 3, 4}, {5, 6, 7}};

An example of element access:

Console.WriteLine(myNumbers[1, 2]); // Outputs 7

And modifying elements:

myNumbers[1, 2] = 5;
Console.WriteLine(myNumbers[1, 2]); // Outputs 5

Note: The single comma [,] specifies that the array is two-dimensional. A three-dimensional array would have two commas: int[,,], and so on…