title: IsPostBack always returns false
body: <p>I've encountered a weird problem. Everytime I refresh the page, <code>IsPostBack</code> is false.<br>
  To make sure nothing in my contents or master pages is causing this, I have created an empty web form and fired it up in debug mode. still, on postbacks, I have <code>IsPostBack</code> set to false.  </p>
  
  <p>I have <code>enableSessionState="true"</code> and <code>&lt;sessionState timeout="30" /&gt;</code> in web.config.  </p>
  
  <p>It's driving me nuts!</p>
  
  <p><strong>Update:</strong> I refresh the page by hitting F5. Based on answers this should not cause a postback. I'd like to know when a use refreshes the page (even manually) and prevent some modifications to db).<br>
  Is there a solution for this?</p>