Module Module1
Sub Main()
Dim list As New List(Of String)(New String() {"c#", "vb.net", "c", "c++", "php", "java"})
Console.WriteLine(ListToString(list))
End Sub
Function ListToString(ByVal list As List(Of String)) As String
Dim s As String = String.Join(" ", list.ToArray())
Return s
End Function
End Module
' run:
'
' c# vb.net c c++ php java