title: After EXE installed 'No connection string named 'ConnectionString' could be found in the application config file'
body: <p>I had winform project with Entity Framework. I have created two projects one is main and another is for Entity Framework(i.e. DAL). </p>
  
  <p>It is working fine while I run from Visual Studio. Then I created Setup file of it while I installed in pc, it is successfully installed,</p>
  
  <p>But when I run the program it gives an error like</p>
  
  <blockquote>
    <p>No connection string named 'ConnectionString' could be found in the application config file</p>
  </blockquote>