title: How to set Route Prefix in conventional routing
body: <p>I am having an old Asp.Net Web Form application where I am mapping urls using conventional routing. 
  Now I want to add a common prefix to all the aspx pages.</p>
  
  <blockquote>
    <p>One solution is - I can manually add the prefix in all the url patterns one by one.</p>
  </blockquote>
  
  <p>Is there any way to make it common?</p>
  
  <p>Note: I can not use AttributeRouting. Please suggest something in conventional routing.</p>