. NET clear session [Clear/removeall/remove/abandon]

1.clear ()
clears the value of all session objects, but preserves the session

2.removeAll ()
call the Clear () method

3.remove ("sessionname")
Delete a Session object

4.Abandon ()
ends the current session and deletes all session objects, and calls the Session_End method (InProc mode). The Session_Start method is fired when the next request arrives. The Abandon method is used to actively end the session, and if the method is not called, the current session is automatically ended when the session times out.