VB.Net by API/System.Security.Principal/WindowsIdentity

WindowsIdentity.GetCurrent

  
Imports System.Windows.Forms
Imports System.Security.Principal
Imports System.Security.Permissions
Public Class SymEnc
    Public Shared Sub Main(ByVal CmdArgs() As String)
        Dim objIdentity As WindowsIdentity = WindowsIdentity.GetCurrent
        Dim objPrincipal As New Security.Principal.WindowsPrincipal(objIdentity)
        Console.WriteLine(objPrincipal.Identity.IsAuthenticated.ToString())
        Console.WriteLine(objIdentity.IsGuest.ToString())
        Console.WriteLine(objIdentity.ToString())
    End Sub
End Class

WindowsIdentity.IsGuest

  
Imports System.Windows.Forms
Imports System.Security.Principal
Imports System.Security.Permissions
Public Class SymEnc
    Public Shared Sub Main(ByVal CmdArgs() As String)
        Dim objIdentity As WindowsIdentity = WindowsIdentity.GetCurrent
        Dim objPrincipal As New Security.Principal.WindowsPrincipal(objIdentity)
        Console.WriteLine(objPrincipal.Identity.IsAuthenticated.ToString())
        Console.WriteLine(objIdentity.IsGuest.ToString())
        Console.WriteLine(objIdentity.ToString())
    End Sub
End Class