title: from 4.5 to 4.0 :The type or namespace name 'AspNet' does not exist in the namespace 'Microsoft'
body: <p>I was working on .Net 4.5 used SignalR 1.1.2 and everything works fine.
  Then we want to lower the version of netframework to 4.0 cos of production server, everything stopped and this error appeared. Please tell me what to do?</p>
  
  <pre><code>The type or namespace name 'AspNet' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
  </code></pre>