title: remove proxy setting from App.Config in runtime ? ( C# .Net 4 )
body: <p>I'm writing a C# application with.net 4.0.
  Is there any way that I can remove something ( like a proxy setting ) from App.Config in runtime ?
  if yes than is there any way that I can put it back again ?</p>
  
  <p>Farzad</p>