title: What is MapRoute namespaces parameter for?
body: <p>ASP.NET MVC's MapRoute method has a parameter named <code>namespaces</code>. From looking in the code, I see that this parameter is saved in the <code>Route</code> object in <code>DataTokens["Namespaces"]</code>.</p>
  
  <p>It seems to me that it has some meaning... anyone knows what is it for?</p>