function b64_md5(s) for C#
<p>One of my client site uses <a href="http://pajhome.org.uk/crypt/md5/md5.html" rel="nofollow">MD5.js</a></p>

<p>in particular this function</p>

<pre><code>function b64_md5(s)    { return rstr2b64(rstr_md5(str2rstr_utf8(s))); }
</code></pre>

<p>Is there an equivalent of this in </p>
