title: Why can't I debug my asp.net web project anymore?
body: <p>Something has changed in my ASP.NET web project... I used to be able to debug.  Now my breakpoints are being ignored.  I checked my web.config, and it says:</p>
  
  <pre><code>&lt;compilation defaultLanguage="c#" debug="true" targetFramework="4.0"&gt;
  </code></pre>
  
  <p>So that all seems in order.  What else might be messing up my debug environment?</p>
  
  <p><strong>EDIT:</strong> I should also mention that when I run a console app, breakpoints work fine.  It's only when I run the web app that breakpoints just don't happen.</p>
  
  <p>This only happens when I'm debugging using IIS.  If I use the VS Dev Server, my breakpoints work!</p>