title: Duplicate items are not supported by the "Resources" parameter
body: <p>The item <code>obj\Debug\BookStore.MainForm.resources</code> was specified more than once in the <code>Resources</code> parameter. Duplicate items are not supported by the <code>Resources</code> parameter.</p>
  
  <p>How do I fix this?</p>
  
  <p><img src="https://i.stack.imgur.com/AzvC1.png" alt="enter image description here"></p>