title: Regex to replace namespace
body: <p>I have the following string </p>
  
  <pre><code>string s = "efile:ReturnState/efile:ReturnDataState/efile:processBO/composition/forms/IT204CP";
  </code></pre>
  
  <p>I would like to replace the <code>efile:</code> name space with an empty string and would like the result to be as follows</p>
  
  <blockquote>
    <p>"ReturnState/ReturnDataState/processBO/composition/forms/IT204CP";</p>
  </blockquote>
  
  <p>I also would like to know if there is a more generic way of doing this, as in something where I can replace any namespace like we see above and not just <code>efile</code>?</p>