title: status code 304 not modified, but file was modified
body: <p>I have cleared the browser cache, and have restarted the browser, but Chrome still returns <code>304</code> code.</p>
  
  <p>How do I make IIS return <code>200</code> code?</p>
  
  <p><a href="https://i.stack.imgur.com/O7S3p.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O7S3p.png" alt="this css file have modified"></a></p>
  
  <p>request respond details:</p>
  
  <p><img src="https://i.stack.imgur.com/zfR4c.jpg" alt="enter image description here"></p>