<script language="vb" runat=server >
    Sub Page_Load(sender As Object, e As EventArgs) Handles MyBase.Load
      If HttpContext.Current.User.Identity.Name = "" Then
        lblLogin.Text = "You're not registered, please login"
      Else
        lblLogin.Text = "You're registered as " & _
          HttpContext.Current.User.Identity.Name
      End If
    End Sub
    
    Sub btnLogin_Click(sender As Object, e As EventArgs) Handles btnLogin.Click
      Response.Redirect("login.aspx")
    End Sub
  </script>

<script language="С#" runat=server >
    ...  
</script>

<script language="C#" runat="server">
void Page_Load(object sender, System.EventArgs e)
{
if  (HttpContext.Current.User.Identity.Name == "") 
  lblLogin.Text = "You are not reg";
else
 lblLogin.Text = "You are "+HttpContext.Current.User.Identity.Name;
				
Response.Write("hi");
	
}

    Event +=new System.EventHandler(Page_Load)