ASP.Net Session data lost between pages

Question

I came across a weird behavior today w/ my web application. When I navigate from a page to another, I lose one particular session variable data.

I'm able to launch the app in firefox and able to see that the session data is not lost.

I use Response.Redirect(page2, false) to redirect to another page.

Below code was used to track session variables

System.IO.StreamWriter sw = new System.IO.StreamWriter(@"c:\test.txt", true);
for (int i = 0; i < Session.Count; i++)
{
 sw.WriteLine(Session.Keys[i] + " " + Session.Contents[i]);
}
sw.Close();

Can anyone help me in this? Any help is appreciated.

Answer 1

See http://stackoverflow.com/questions/2306147/ie8-losing-session-while-firefox-works-fine for a similar problem.

Answer 2

Are you developing in a web farm / web garden environment?

Answer 3

Try using the state server mode. Depending on how your application pool is configured and your deployments the default in-process mode can be unpredictable.