public static void Main()
int[][] arr = new int[2][];
arr[0] = new int[5] { 1, 3, 5, 7, 9 };
arr[1] = new int[4] { 2, 4, 6, 8 };
for (int i = 0; i < arr.Length; i++)
System.Console.Write("Element({0}): ", i);
for (int j = 0; j < arr[i].Length; j++)
System.Console.Write("{0}{1}", arr[i][j], j == (arr[i].Length - 1) ? "" : " ");
System.Console.WriteLine();