Logout Button wurde gefixed

login/Logout.aspx.vb

@@ -1,14 +1,33 @@
 
+Imports System.Web.Configuration
+
 Partial Class login_Logout
     Inherits System.Web.UI.Page
-    Protected Sub Page_Load(sender As Object, e As EventArgs)
+
+    Dim sessionname
+    Sub Page_Load() Handles Me.Load
+
         FormsAuthentication.SignOut()
-        Dim sessionname = Session.Item("lastpage").ToString
-        Session.Clear() 'clear session
-        Session.Abandon() 'Abandon session
-        Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1))
-        Response.Cache.SetCacheability(HttpCacheability.NoCache)
-        Response.Cache.SetNoStore()
-        Response.Redirect(sessionname)
+        Session.Abandon()
+
+        'clear authentication cookie
+        Dim cookie1 As HttpCookie = New HttpCookie(FormsAuthentication.FormsCookieName, "")
+        cookie1.Expires = DateTime.Now.AddYears(-1)
+        Response.Cookies.Add(cookie1)
+
+        'clear session cookie (Not necessary for your current problem but i would recommend you do it anyway)
+        Dim sessionStateSection As New SessionStateSection
+        sessionStateSection = WebConfigurationManager.GetSection("system.web/sessionState")
+        Dim cookie2 As HttpCookie = New HttpCookie(sessionStateSection.CookieName, "")
+        cookie2.Expires = DateTime.Now.AddYears(-1)
+
+        Response.Cookies.Add(cookie2)
+        Response.Redirect("../newpageJulius_Sidebar.aspx")
+    End Sub
+
+
+    Protected Sub btn_backtostart_Click(sender As Object, e As EventArgs)
+        Response.Redirect("../newpageJulius_Sidebar.aspx")
+
     End Sub
 End Class