title: Get Numbers from file name
body: <p>I am trying to get date from  file name, so I built this reg ex expression, but I am getting 136413 instead of 6413 , how can I tell this script to skip the numbers associated to FY like FY13. so that my end result should like this 642013 not 13642013 . </p>
  
  <p>Thanks in advance. </p>
  
  <pre><code>string input = "X_X_FY13_Template_X_6 4 13_V2.xlsx";
  string result = Regex.Replace(input, @"[^\d]", "");
  MessageBox.Show(result); 
  </code></pre>