'Use the Push method to push five strings onto the stack.
'The elements of the stack are enumerated, which does not change the state of the stack.
'The Pop method is used to pop the first string off the stack.
'The Peek method is used to look at the next item on the stack
'The ToArray method is used to create an array and copy the stack elements to it
Imports System
Imports System.Collections.Generic
Module Example
Sub Main
Dim numbers As New Stack(Of String)
numbers.Push("one")
numbers.Push("two")
numbers.Push("three")
numbers.Push("four")
numbers.Push("five")
For Each number As String In numbers
Console.WriteLine(number)
Next
Console.WriteLine(vbLf & "Popping '{0}'", numbers.Pop())
Console.WriteLine("Peek at next item to pop: {0}",numbers.Peek())
Console.WriteLine("Popping '{0}'", numbers.Pop())
Dim stack2 As New Stack(Of String)(numbers.ToArray())
For Each number As String In stack2
Console.WriteLine(number)
Next
Dim array2((numbers.Count * 2) - 1) As String
numbers.CopyTo(array2, numbers.Count)
Dim stack3 As New Stack(Of String)(array2)
Console.WriteLine("Contents of the second copy, with duplicates and nulls:")
For Each number As String In stack3
Console.WriteLine(number)
Next
Console.WriteLine("stack2.Contains(""four"") = {0}",stack2.Contains("four"))
Console.WriteLine("stack2.Clear()")
stack2.Clear()
Console.WriteLine("stack2.Count = {0}",stack2.Count)
End Sub
End Module
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