How to Kill A Session or Session ID (ASP.NET/C#)
The Abandon method should work (MSDN):
Session.Abandon();If you want to remove a specific item from the session use (MSDN):
Session.Remove("YourItem");EDIT: If you just want to clear a value you can do:
Session["YourItem"] = null;If you want to clear all keys do:
Session.Clear();If none of these are working for you then something fishy is going on. I would check to see where you are assigning the value and verify that it is not getting reassigned after you clear the value.
Simple check do:
Session["YourKey"] = "Test"; // creates the keySession.Remove("YourKey"); // removes the keybool gone = (Session["YourKey"] == null); // tests that the remove worked