title: ie9 loses cookies after redirect
body: <p>I have an iframe that:</p>
  
  <ol>
  <li>does a post request to server</li>
  <li>server returns 302 and sets cookie</li>
  <li>browser not saves cookies but does a post(don't know why not get but it doesn't matter)</li>
  <li>cookie from #3 are lost</li>
  </ol>
  
  <p>i've found a workaround:</p>
  
  <pre><code>Response.AddHeader("Pragma", "no-cache");
  Response.AddHeader("Cache-Control", "no-cache");
  </code></pre>
  
  <p>but it didn't help.
  mb anybody knows what can fix this issue?</p>