title: c# - Check if string ends with 4 numbers
body: <p>I'm trying to figure out the best way to determine if a <code>string</code> ends with exactly 4 numbers.  The number range would be from 0000-9999.</p>
  
  <p>eg. I have a string that could be either "MVI_2546" or something like "FILETEST".</p>
  
  <p>I need to parse that string and essentially return a <code>true</code> or <code>false</code> value depending on whether it ends in exactly 4 numbers or not.</p>