title: Is it useful to #container, #Wrapper in every CSS layout?
body: <p>Is it useful to add whole code in <code>#container</code>, <code>#Wrapper</code> in every CSS layout? Can't we make layout without this extra <code>div</code> ? What are pros and cons to use this extra <code>div</code>?</p>
  
  <p>Is it good practice ? Is it useful for any type of design/layout? Is it semantically correct?</p>