Data Structure VB.Net

Imports System
Public Class Example
    Public Shared Sub Main()
        Dim numbers() As String = { "One","Two","Three","XXX","Four","One","Five" }
        For Each num As String In numbers
            Console.WriteLine(num)
        Next
        Console.WriteLine(Array.LastIndexOf(numbers, "One"))
        Console.WriteLine(Array.LastIndexOf(numbers, "One", 3))
        Console.WriteLine(Array.LastIndexOf(numbers, "One", 4, 4))
    End Sub
End Class