title: ConfigurationManager class not available
body: <p><img src="https://i.stack.imgur.com/Ff6tn.png" alt="enter image description here"></p>
  
  <p>I am not able to get the connectionString from App.Config file..</p>
  
  <p>Am I missing something?</p>
  
  <p>after creating the class, I moved the class into some folder..Is that the issue? what is the solution without moving the class?</p>