title: Unity c# error quaternion is unrecognized in console
body: <p>Im getting an error saying &quot;quaternion&quot; is unrecognized</p>
  <pre><code>using UnityEngine;
  using System.Collections;
  
  public class ExampleClass : MonoBehaviour
  {
      public GameObject prefab;
  
      // Instantiate the Prefab somewhere between -10.0 and 10.0 on the x-z plane
      void Start()
      {
          Vector3 position = new Vector3(Random.Range(-10.0f, 10.0f), 0, Random.Range(-10.0f, 10.0f));
          Instantiate(prefab, position, quaternion.identity);
      }
  }
  </code></pre>