Imports System
Imports System.Collections.Generic
Public Class Program
Public Shared Sub Main()
Dim hs As HashSet(Of String) = New HashSet(Of String)()
hs.Add("a")
hs.Add("b")
hs.Add("c")
hs.Add("d")
For Each element In hs
Console.WriteLine(element)
Next
End Sub
End Class
' run:
'
' a
' b
' c
' d
'