Multiple project solution, 'missing assembly reference' despite including it
<p>I have two projects in the current solution:</p>

<pre><code>abc.Dashboard
abc.ThingyService
</code></pre>

<p>abc.ThingyService needs to be able to use a class from abc.Dashboard.</p>

<p>I've added a reference to abc.ThingyService pointing at abc.Dashboard (right click on project -> add reference -> projects -> abc.Dashboard) but it's not recognising that it has been added.</p>

<p>One of the files in the abc.ThingyService project contains:</p>

<pre><code>using abc.Dashboard.Services
</code></pre>

<p>When I compile, I get the error:</p>

<pre><code>The type or namespace name 'Dashboard' does not exist in the namespace 'abc' (are you missing an assembly reference?)   
</code></pre>

<p>Am I missing something very obvious here? :/</p>
