Hi mvadukul,
Refer the below code.
C#
int[] array = new int[] { 123456, 654321, 321456, 456321, 213456, 214356 };
// Get array count.
int count = array.Length;
// Get reverse array.
int[] arrayReverse = array.Reverse().ToArray();
// Get random no.
var random = new Random();
int randomNumber = array[random.Next(array.Length)];
VB.Net
Dim array As Integer() = New Integer() {123456, 654321, 321456, 456321, 213456, 214356}
' Get array count.
Dim count As Integer = array.Length
' Get reverse array.
Dim arrayReverse As Integer() = array.Reverse().ToArray()
' Get random no.
Dim random = New Random()
Dim randomNumber As Integer = array(random.[Next](array.Length))