User.Identity
<%@ Page Language="vb" %> <html> <head> <title>User property example</title> <script runat="server"> Sub Page_Load() Message.Text = "Authenticated: " & User.Identity.IsAuthenticated & "<br/>" Message.Text &= "User Name: " & User.Identity.Name End Sub </script> </head> <body> <asp:label id="Message" runat="server"/> </body> </html>