title: Add 1 week to current date
body: <p>I've got something like this <code>DateTime.Now.ToString("dd.MM.yy");</code> In my code, And I need to add 1 week to it, like <code>5.4.2012</code> to become <code>12.4.2012</code> I tried to convert it to int and then add it up, but there is a problem when it's up to 30.</p>
  
  <p>Can you tell me some clever way how to do it?</p>