Imports System
Class Sample
Public Shared Sub Main()
Dim os As OperatingSystem = Environment.OSVersion
Dim pid As PlatformID = os.Platform
Select Case pid
Case PlatformID.Win32NT, PlatformID.Win32S, _
PlatformID.Win32Windows, PlatformID.WinCE
Console.WriteLine("This is a Windows operating system.")
Case PlatformID.Unix
Console.WriteLine("This is a Unix operating system.")
Case Else
Console.WriteLine("ERROR: This platform identifier is invalid.")
End Select
End Sub 'Main
End Class 'Sample