title: How to create and store managed objects containing the data using Swift 3.0 in Xcode 8.2
body: <p>I'm getting an error 'use of unresolved identifier 'Contacts' '( it's the name i have given as Entity name in my 'fileName.xcdatamodeld' ).</p>
  
  <pre><code>import UIKit
  import CoreData
  
  class ViewController: UIViewController {
  
      let managedObjectContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext         
     override func viewDidLoad() {
          super.viewDidLoad()         
      }
      @IBAction func SaveContact(_ sender: Any) {
          let entityDescription = NSEntityDescription.entity(forEntityName: "Contacts",in: managedObjectContext)
  
          let contact = Contacts(entity: entityDescription!,insertInto: managedObjectContext) // Error: Use of unresolved identifier 'Contacts'
      }
      @IBAction func Findcontact(_ sender: Any) {
      }
     }
  </code></pre>