Imports System
Imports System.Collections.Generic
Public Class Program
Public Shared Sub Main(ByVal args As String())
Dim hset As HashSet(Of String) = New HashSet(Of String) From {
"vb.net",
"c#",
"c",
"c++",
"php",
"python"
}
Dim str As String = String.Join(" ", hset)
Console.WriteLine(str)
End Sub
End Class
' run:
'
' vb.net c# c c++ php python
'