title: Convert.FromBase64String Exception
body: <p>when I try to do the following code : </p>
  
  <pre><code>byte[] arr= Convert.FromBase64String("1/50/Zoolz/Win-s9u0uco8ea0(11)/349.jpg")
  </code></pre>
  
  <p>I received the following error: </p>
  
  <p>The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters.</p>
  
  <p>who can I solve it?</p>