Language Basics C# Book

C# has the following simplified array onitialization form.
using System;
class Program
{
static void Main(string[] args)
{
char[] letters = { 'a', 'b', 'c', 'd', 'e' };
int[,] rectangularMatrix =
{
{0,1,2},
{3,4,5},
{6,7,8}
};
int[][] jaggedMatrix =
{
new int[] {0,1,2},
new int[] {3,4,5,999},
new int[] {6,7,8}
};
}
}