title: Specified key is not a valid size for this algorithm
body: <p>I have with this code:</p>
  <pre class="lang-cs prettyprint-override"><code>RijndaelManaged rijndaelCipher = new RijndaelManaged();
                
  // Set key and IV
  rijndaelCipher.Key = Convert.FromBase64String(&quot;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz012345678912&quot;);
  rijndaelCipher.IV = Convert.FromBase64String(&quot;1234567890123456789012345678901234567890123456789012345678901234&quot;);
  </code></pre>
  <p>I get this exception thrown:</p>
  <blockquote>
  <p>Specified key is not a valid size for this algorithm.</p>
  <p>Specified initialization vector (IV) does not match the block size for this algorithm.</p>
  </blockquote>
  <p>What's wrong with this strings ? Can I count at some examples strings from you?</p>