Passing Data

Hi;
I'm going to pass some data between pages.
I've tried 
Session["Data"] = DataToSendTextBox.Text; but the server, my website host, seems that doesn't hold data in memory for long time, even 10 seconds!
I'm going to try this one:
Response.Redirect("QueryStringPage.aspx?Data=" + Server.UrlEncode(DataToSendTextBox.Text));


I was wondering whether it depends on the host or not?
thanks,
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