title: Passing parameters using Server.Transfer but not using query string
body: <p>I have a registration form and want to transfer the user to the success page, telling him that an email was sent to his email. I need to transfer his email from the register page to the success page.</p>
  
  <p>I found about Server.Transfer, but I can't find out how to send parameters. I don't want to use query string as I don't like revealing information in the URL.</p>
  
  <p>What is the proper way (if possible) to do this?</p>