title: .Net adding a prefix ctl00_CPHPageContents_ to control IDs
body: <p>I have an asp.net C# web forms application in .net framework 4
  In my pages, when I view html source it changes control IDs to something like <code>ctl00_CPHPageContents_txtUserID</code> actually it is <code>txtUserID</code></p>
  
  <p>This application was first in Framework 3.5 and IDs were generated like <code>CPHPageContents_txtUserID</code></p>
  
  <p>So, in short, in Framework 3.5 Id was <code>CPHPageContents_txtUserID</code> and now in Framework 4 ID is <code>ctl00_CPHPageContents_txtUserID</code> which is breaking our automation tests. Can I remove this <code>ctl00</code> added by Framework 4?</p>