title: Error 18 The type or namespace name 'TeamFoundation' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
body: <pre><code>using Microsoft.TeamFoundation.WorkItemTracking.Client;
  using Microsoft.TeamFoundation.WorkItemTracking.Controls;
  </code></pre>
  
  <p>I added The reference from following paths  :</p>
  
  <p>1)C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.TeamFoundation.WorkItemTracking.Controls\v4.0_12.0.0.0__b03f5f7f11d50a3a</p>
  
  <p>I also tried :<br>
  2)C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\ReferenceAssemblies\v2.0</p>
  
  <p>but it not work
  what should i do ? </p>