How to send sensitive data from one to another page?

Hi, need help with security. I have default ASPNETBD database with membership schema and everything works, - the users can login,  the LoginName control shows the username and LoginStatus shows status, but now i need to send username to another page (for example to userdata.aspx page).
The question is how i should send UserName from LoginName control to another page? Or maybe, someone could tell me a better idea how to send that sensitive information from one page to another? I will be very grateful.


Audrius
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