title: InternalsVisibleTo attribute isn't working
body: <p>I am trying to use the <code>InternalsVisibleTo</code> assembly attribute to make my internal classes in a .NET class library visible to my unit test project.  For some reason, I keep getting an error message that says:</p>
  
  <blockquote>
    <p>'MyClassName' is inaccessible due to its protection level</p>
  </blockquote>
  
  <p>Both assemblies are signed and I have the correct key listed in the attribute declaration.  Any ideas?</p>