title: Converting hex string back to char
body: <p>I know- there are lots of topics concerning this, BUT even though I did look through a bunch of them couldn't figure the solution..
  I'm converting char to hex like this:</p>
  
  <pre><code>char c = i;
  int unicode = c;
  string hex = string.Format("0x{0:x4}", unicode);
  </code></pre>
  
  <p>Question: how to convert hex to char back?</p>