c# easiest way to extract substring
<p>i have a string:</p>

<pre><code>string somestring = "\\\\Tecan1\\tecan #1 output\\15939-E.ESY"
</code></pre>

<p>i need to extract <code>15939</code></p>

<p>it will always be a 5 digit number, always preceeded by '\' and it will always "-" after it</p>
