title: Passing different date values for the same method
body: <p>I need to pass date param to a method which may be of different dates
  for example the date may be expirydate or createddate?</p>
  
  <p>How do i pass to a method</p>
  
  <pre><code>void dosomething(?datetime whateverthedate)
  {
  // doawesomehere
  }
  </code></pre>
  
  <p>I am limited to .net 4.0 framework.</p>