title: is it possible to convert from byte[] to base64string and back
body: <p>I tried this:</p>
  
  <pre><code>Console.WriteLine(Convert.ToBase64String(Encoding.UTF8.GetBytes("hi")));
  
  Console.WriteLine(Convert.ToBase64String(Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes("hi")))));
  </code></pre>
  
  <p>and I get different results for them, although I thought that it should be the same</p>