What's the most efficient way to change the last element in a '/' delimited string
<p>I have a string object in c# with a bunch of elements delimited by '/' characters.  The string will look something like this:</p>

<p>"element1/element2/element3/element4"</p>

<p>What's the most efficient way to change the last element in the '/' delimited string?</p>

<p>Thanks,</p>

<p>helixed</p>
