title: Security concerns in a WPF application
body: <p>I am making a WPF application which will handle a lot of sensitive data like usernames, passwords, emails etc. All this data is shown in textboxes and passwordboxes in the app. When the application closes I need all the data that was in memory to be deleted just so no one can later retrieve it.</p>
  
  <p>Can you tell me some guidelines or tips on what I need to pay attention to, or techniques I can use to make this project as secure as possible?</p>
  
  <p>Thank you  </p>