title: CS0246: The type or namespace name could not be found
body: <p><a href="https://i.stack.imgur.com/G2GHm.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/G2GHm.jpg" alt="enter image description here"></a></p>
  
  <p>As shown I have error in using DashboardBusiness;
  I need an access class1.cs but I'm getting The type or namespace name could not be found.</p>