Recently I got a problem with my page it was working fine last week I don't change anything at all but suddenly after submit form and post to another website (Bank Payment) and returning to my site sessionId Changed and all session data lost.
i check all solution in the web: 1. set data in Session Object 2. set data in Session_Start() Global.asax 3. use Response.Redirect(url,false flag)
P.S.: I use java script to submit form