title: Adding a reference to a dll in a WCF project
body: <p>I've just started using WCF here at work and am trying to add a reference to a DLL that's available here at work.</p>
  
  <p>I continually get this error:</p>
  
  <blockquote>
    <p>Error  1   Reference required to assembly 'Name.of.the.dll.here, Version=1.0.2824.29400, Culture=neutral, PublicKeyToken=111111111' containing the implemented interface 'Name.of.the.dll.here.IInterface'. Add one to your project.   </p>
  </blockquote>
  
  <p>I've tried adding the reference a variety of ways (Productivity Power tools, VS2010 adding reference). The reference exists in my references folder. </p>
  
  <p>The dll is targeting .NET 3.5 and my WCF is 4.0, but I'm not sure if that would make a difference.</p>
  
  <p>Any clue why my refrence doesn't work?</p>