title: The name "Interaction" does not exist in the namespace "http://schemas.microsoft.com/expression/2010/interactivity"
body: <p>I've used the System.Windows.Interactivity DLL in several projects without any problem.
  Now in my latest project I can't get it to work. I always get the following error:</p>
  
  <p>The name "Interaction" does not exist in the namespace "<a href="http://schemas.microsoft.com/expression/2010/interactivity" rel="noreferrer">http://schemas.microsoft.com/expression/2010/interactivity</a>".    </p>
  
  <pre><code>&lt;i:Interaction.Triggers&gt;
      &lt;EventTrigger EventName="SelectionChanged"&gt;
          &lt;i:InvokeCommandAction Command="{Binding AddSelectLocomotifCommand}"
              CommandParameter="{Binding SelectedItem, ElementName=listBoxLocs}" /&gt;
      &lt;/EventTrigger&gt;
  &lt;/i:Interaction.Triggers&gt;
  </code></pre>
  
  <p>And the namespace: </p>
  
  <pre><code>xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
  </code></pre>
  
  <p>Both <code>Microsoft.Expression.Interactions</code> and <code>System.Windows.Interactivity</code> are added to the projects references and I even copied the DLL's to a folder within my project.</p>
  
  <p>Any idea how this comes? I use VS2012 with .NET 4.5</p>